void LowMachNavierStokes<Mu,SH,TC>::assemble_thermo_press_mass_residual( bool /*compute_jacobian*/,
AssemblyContext& context )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_p0_dofs = context.get_dof_indices(this->_p0_var).size();
const unsigned int n_T_dofs = context.get_dof_indices(this->_T_var).size();
const unsigned int n_p_dofs = context.get_dof_indices(this->_p_var).size();
// Element Jacobian * quadrature weights for interior integration
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_T_var)->get_JxW();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& T_phi =
context.get_element_fe(this->_T_var)->get_phi();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& p_phi =
context.get_element_fe(this->_p_var)->get_phi();
// The subvectors and submatrices we need to fill:
libMesh::DenseSubVector<libMesh::Real> &F_p0 = context.get_elem_residual(this->_p0_var);
libMesh::DenseSubVector<libMesh::Real> &F_T = context.get_elem_residual(this->_T_var);
libMesh::DenseSubVector<libMesh::Real> &F_p = context.get_elem_residual(this->_p_var);
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp = 0; qp != n_qpoints; ++qp)
{
libMesh::Number T;
T = context.fixed_interior_value(this->_T_var, qp);
libMesh::Number cp = this->_cp(T);
libMesh::Number cv = cp + this->_R;
libMesh::Number gamma = cp/cv;
libMesh::Number one_over_gamma = 1.0/(gamma-1.0);
libMesh::Number p0_dot = context.interior_value(this->_p0_var, qp );
libMesh::Number p0 = context.fixed_interior_value(this->_p0_var, qp );
for (unsigned int i=0; i != n_p0_dofs; i++)
{
F_p0(i) += p0_dot*one_over_gamma*JxW[qp];
}
for (unsigned int i=0; i != n_T_dofs; i++)
{
F_T(i) -= p0_dot*T_phi[i][qp]*JxW[qp];
}
for (unsigned int i=0; i != n_p_dofs; i++)
{
F_p(i) -= p0_dot/p0*p_phi[i][qp]*JxW[qp];
}
}
return;
}
void HeatConduction<K>::mass_residual( bool compute_jacobian,
AssemblyContext& context,
CachedValues& /*cache*/ )
{
// First we get some references to cell-specific data that
// will be used to assemble the linear system.
// Element Jacobian * quadrature weights for interior integration
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(_temp_vars.T_var())->get_JxW();
// The shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& phi =
context.get_element_fe(_temp_vars.T_var())->get_phi();
// The number of local degrees of freedom in each variable
const unsigned int n_T_dofs = context.get_dof_indices(_temp_vars.T_var()).size();
// The subvectors and submatrices we need to fill:
libMesh::DenseSubVector<libMesh::Real> &F =
context.get_elem_residual(_temp_vars.T_var());
libMesh::DenseSubMatrix<libMesh::Real> &M =
context.get_elem_jacobian(_temp_vars.T_var(), _temp_vars.T_var());
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp = 0; qp != n_qpoints; ++qp)
{
// For the mass residual, we need to be a little careful.
// The time integrator is handling the time-discretization
// for us so we need to supply M(u_fixed)*u' for the residual.
// u_fixed will be given by the fixed_interior_value function
// while u' will be given by the interior_rate function.
libMesh::Real T_dot;
context.interior_rate(_temp_vars.T_var(), qp, T_dot);
for (unsigned int i = 0; i != n_T_dofs; ++i)
{
F(i) -= JxW[qp]*(_rho*_Cp*T_dot*phi[i][qp] );
if( compute_jacobian )
{
for (unsigned int j=0; j != n_T_dofs; j++)
{
// We're assuming rho, cp are constant w.r.t. T here.
M(i,j) -=
context.get_elem_solution_rate_derivative()
* JxW[qp]*_rho*_Cp*phi[j][qp]*phi[i][qp] ;
}
}// End of check on Jacobian
} // End of element dof loop
} // End of the quadrature point loop
return;
}
void BoussinesqBuoyancyAdjointStabilization<Mu>::init_context( AssemblyContext& context )
{
context.get_element_fe(this->_flow_vars.p_var())->get_dphi();
context.get_element_fe(this->_flow_vars.u_var())->get_dphi();
context.get_element_fe(this->_flow_vars.u_var())->get_d2phi();
return;
}
void LowMachNavierStokesSPGSMStabilization<Mu,SH,TC>::assemble_energy_mass_residual( bool /*compute_jacobian*/,
AssemblyContext& context )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_T_dofs = context.get_dof_indices(this->_temp_vars.T()).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_temp_vars.T())->get_JxW();
// The temperature shape functions gradients at interior quadrature points.
const std::vector<std::vector<libMesh::RealGradient> >& T_gradphi =
context.get_element_fe(this->_temp_vars.T())->get_dphi();
libMesh::DenseSubVector<libMesh::Number> &FT = context.get_elem_residual(this->_temp_vars.T()); // R_{T}
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::Number u, v;
u = context.fixed_interior_value(this->_flow_vars.u(), qp);
v = context.fixed_interior_value(this->_flow_vars.v(), qp);
libMesh::Gradient grad_T = context.fixed_interior_gradient(this->_temp_vars.T(), qp);
libMesh::NumberVectorValue U(u,v);
if (this->mesh_dim(context) == 3)
U(2) = context.fixed_interior_value(this->_flow_vars.w(), qp); // w
libMesh::Real T = context.fixed_interior_value( this->_temp_vars.T(), qp );
libMesh::Real rho = this->rho( T, this->get_p0_transient( context, qp ) );
libMesh::Real k = this->_k(T);
libMesh::Real cp = this->_cp(T);
libMesh::Number rho_cp = rho*this->_cp(T);
libMesh::FEBase* fe = context.get_element_fe(this->_flow_vars.u());
libMesh::RealGradient g = this->_stab_helper.compute_g( fe, context, qp );
libMesh::RealTensor G = this->_stab_helper.compute_G( fe, context, qp );
libMesh::Real tau_E = this->_stab_helper.compute_tau_energy( context, qp, g, G, rho, U, k, cp, false );
libMesh::Real RE_t = this->compute_res_energy_transient( context, qp );
for (unsigned int i=0; i != n_T_dofs; i++)
{
FT(i) -= rho_cp*tau_E*RE_t*U*T_gradphi[i][qp]*JxW[qp];
}
}
return;
}
void VelocityPenaltyAdjointStabilization<Mu>::init_context( AssemblyContext& context )
{
context.get_element_fe(this->_press_var.p())->get_dphi();
context.get_element_fe(this->_flow_vars.u())->get_xyz();
context.get_element_fe(this->_flow_vars.u())->get_phi();
context.get_element_fe(this->_flow_vars.u())->get_dphi();
context.get_element_fe(this->_flow_vars.u())->get_d2phi();
return;
}
void LowMachNavierStokes<Mu,SH,TC>::assemble_energy_time_deriv( bool /*compute_jacobian*/,
AssemblyContext& context,
CachedValues& cache )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_T_dofs = context.get_dof_indices(this->_T_var).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_T_var)->get_JxW();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& T_phi =
context.get_element_fe(this->_T_var)->get_phi();
// The temperature shape functions gradients at interior quadrature points.
const std::vector<std::vector<libMesh::RealGradient> >& T_gradphi =
context.get_element_fe(this->_T_var)->get_dphi();
libMesh::DenseSubVector<libMesh::Number> &FT = context.get_elem_residual(this->_T_var); // R_{T}
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::Number u, v, T, p0;
u = cache.get_cached_values(Cache::X_VELOCITY)[qp];
v = cache.get_cached_values(Cache::Y_VELOCITY)[qp];
T = cache.get_cached_values(Cache::TEMPERATURE)[qp];
p0 = cache.get_cached_values(Cache::THERMO_PRESSURE)[qp];
libMesh::Gradient grad_T = cache.get_cached_gradient_values(Cache::TEMPERATURE_GRAD)[qp];
libMesh::NumberVectorValue U(u,v);
if (this->_dim == 3)
U(2) = cache.get_cached_values(Cache::Z_VELOCITY)[qp]; // w
libMesh::Number k = this->_k(T);
libMesh::Number cp = this->_cp(T);
libMesh::Number rho = this->rho( T, p0 );
// Now a loop over the pressure degrees of freedom. This
// computes the contributions of the continuity equation.
for (unsigned int i=0; i != n_T_dofs; i++)
{
FT(i) += ( -rho*cp*U*grad_T*T_phi[i][qp] // convection term
- k*grad_T*T_gradphi[i][qp] // diffusion term
)*JxW[qp];
}
}
return;
}
void LowMachNavierStokes<Mu,SH,TC>::assemble_mass_time_deriv( bool /*compute_jacobian*/,
AssemblyContext& context,
CachedValues& cache )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_p_dofs = context.get_dof_indices(this->_p_var).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_u_var)->get_JxW();
// The pressure shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& p_phi =
context.get_element_fe(this->_p_var)->get_phi();
libMesh::DenseSubVector<libMesh::Number> &Fp = context.get_elem_residual(this->_p_var); // R_{p}
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::Number u, v, T;
u = cache.get_cached_values(Cache::X_VELOCITY)[qp];
v = cache.get_cached_values(Cache::Y_VELOCITY)[qp];
T = cache.get_cached_values(Cache::TEMPERATURE)[qp];
libMesh::Gradient grad_u = cache.get_cached_gradient_values(Cache::X_VELOCITY_GRAD)[qp];
libMesh::Gradient grad_v = cache.get_cached_gradient_values(Cache::Y_VELOCITY_GRAD)[qp];
libMesh::Gradient grad_T = cache.get_cached_gradient_values(Cache::TEMPERATURE_GRAD)[qp];
libMesh::NumberVectorValue U(u,v);
if (this->_dim == 3)
U(2) = cache.get_cached_values(Cache::Z_VELOCITY)[qp]; // w
libMesh::Number divU = grad_u(0) + grad_v(1);
if (this->_dim == 3)
{
libMesh::Gradient grad_w = cache.get_cached_gradient_values(Cache::Z_VELOCITY_GRAD)[qp];
divU += grad_w(2);
}
// Now a loop over the pressure degrees of freedom. This
// computes the contributions of the continuity equation.
for (unsigned int i=0; i != n_p_dofs; i++)
{
Fp(i) += (-U*grad_T/T + divU)*p_phi[i][qp]*JxW[qp];
}
}
return;
}
void ReactingLowMachNavierStokesStabilizationBase<Mixture,Evaluator>::init_context( AssemblyContext& context )
{
// First call base class
ReactingLowMachNavierStokesAbstract::init_context(context);
// We need pressure derivatives
context.get_element_fe(this->_press_var.p())->get_dphi();
// We also need second derivatives, so initialize those.
context.get_element_fe(this->_flow_vars.u())->get_d2phi();
context.get_element_fe(this->_temp_vars.T())->get_d2phi();
}
void IncompressibleNavierStokesStabilizationBase<Mu>::init_context( AssemblyContext& context )
{
// First call base class
IncompressibleNavierStokesBase<Mu>::init_context(context);
// We need pressure derivatives
context.get_element_fe(this->_flow_vars.p_var())->get_dphi();
// We also need second derivatives, so initialize those.
context.get_element_fe(this->_flow_vars.u_var())->get_d2phi();
return;
}
void PracticeCDRinv::init_context( AssemblyContext& context){
context.get_element_fe(_c_var)->get_JxW();
context.get_element_fe(_c_var)->get_phi();
context.get_element_fe(_c_var)->get_dphi();
context.get_element_fe(_c_var)->get_xyz();
context.get_side_fe(_c_var)->get_JxW();
context.get_side_fe(_c_var)->get_phi();
context.get_side_fe(_c_var)->get_dphi();
context.get_side_fe(_c_var)->get_xyz();
return;
}
void LowMachNavierStokesSPGSMStabilization<Mu,SH,TC>::assemble_continuity_time_deriv( bool /*compute_jacobian*/,
AssemblyContext& context )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_p_dofs = context.get_dof_indices(this->_press_var.p()).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_flow_vars.u())->get_JxW();
// The pressure shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::RealGradient> >& p_dphi =
context.get_element_fe(this->_press_var.p())->get_dphi();
libMesh::DenseSubVector<libMesh::Number> &Fp = context.get_elem_residual(this->_press_var.p()); // R_{p}
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::FEBase* fe = context.get_element_fe(this->_flow_vars.u());
libMesh::RealGradient g = this->_stab_helper.compute_g( fe, context, qp );
libMesh::RealTensor G = this->_stab_helper.compute_G( fe, context, qp );
libMesh::Real T = context.interior_value( this->_temp_vars.T(), qp );
libMesh::Real mu = this->_mu(T);
libMesh::Real rho = this->rho( T, this->get_p0_steady( context, qp ) );
libMesh::RealGradient U( context.interior_value( this->_flow_vars.u(), qp ),
context.interior_value( this->_flow_vars.v(), qp ) );
if( this->mesh_dim(context) == 3 )
U(2) = context.interior_value( this->_flow_vars.w(), qp );
libMesh::Real tau_M = this->_stab_helper.compute_tau_momentum( context, qp, g, G, rho, U, mu, this->_is_steady );
libMesh::RealGradient RM_s = this->compute_res_momentum_steady( context, qp );
// Now a loop over the pressure degrees of freedom. This
// computes the contributions of the continuity equation.
for (unsigned int i=0; i != n_p_dofs; i++)
{
Fp(i) += tau_M*RM_s*p_dphi[i][qp]*JxW[qp];
}
}
return;
}
void HeatTransferSPGSMStabilization<K>::element_time_derivative
( bool compute_jacobian, AssemblyContext & context )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_T_dofs = context.get_dof_indices(this->_temp_vars.T()).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_temp_vars.T())->get_JxW();
const std::vector<std::vector<libMesh::RealGradient> >& T_gradphi =
context.get_element_fe(this->_temp_vars.T())->get_dphi();
libMesh::DenseSubVector<libMesh::Number> &FT = context.get_elem_residual(this->_temp_vars.T()); // R_{T}
libMesh::FEBase* fe = context.get_element_fe(this->_temp_vars.T());
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::RealGradient g = this->_stab_helper.compute_g( fe, context, qp );
libMesh::RealTensor G = this->_stab_helper.compute_G( fe, context, qp );
libMesh::RealGradient U( context.interior_value( this->_flow_vars.u(), qp ),
context.interior_value( this->_flow_vars.v(), qp ) );
if( this->_flow_vars.dim() == 3 )
{
U(2) = context.interior_value( this->_flow_vars.w(), qp );
}
// Compute Conductivity at this qp
libMesh::Real _k_qp = this->_k(context, qp);
libMesh::Real tau_E = this->_stab_helper.compute_tau_energy( context, G, this->_rho, this->_Cp, _k_qp, U, this->_is_steady );
libMesh::Real RE_s = this->_stab_helper.compute_res_energy_steady( context, qp, this->_rho, this->_Cp, _k_qp );
for (unsigned int i=0; i != n_T_dofs; i++)
{
FT(i) += -tau_E*RE_s*this->_rho*this->_Cp*U*T_gradphi[i][qp]*JxW[qp];
}
if( compute_jacobian )
{
libmesh_not_implemented();
}
}
}
void HeatTransferSource<SourceFunction>::element_time_derivative( bool /*compute_jacobian*/,
AssemblyContext& context,
CachedValues& /*cache*/ )
{
#ifdef GRINS_USE_GRVY_TIMERS
this->_timer->BeginTimer("HeatTransferSource::element_time_derivative");
#endif
// The number of local degrees of freedom in each variable.
const unsigned int n_T_dofs = context.get_dof_indices(_temp_vars.T_var()).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(_temp_vars.T_var())->get_JxW();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& T_phi =
context.get_element_fe(_temp_vars.T_var())->get_phi();
// Locations of quadrature points
const std::vector<libMesh::Point>& x_qp = context.get_element_fe(_temp_vars.T_var())->get_xyz();
// Get residuals
libMesh::DenseSubVector<libMesh::Number> &FT = context.get_elem_residual(_temp_vars.T_var()); // R_{T}
// Now we will build the element Jacobian and residual.
// Constructing the residual requires the solution and its
// gradient from the previous timestep. This must be
// calculated at each quadrature point by summing the
// solution degree-of-freedom values by the appropriate
// weight functions.
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::Real q = _source( x_qp[qp] );
for (unsigned int i=0; i != n_T_dofs; i++)
{
FT(i) += q*T_phi[i][qp]*JxW[qp];
}
}
#ifdef GRINS_USE_GRVY_TIMERS
this->_timer->EndTimer("HeatTransferSource::element_time_derivative");
#endif
return;
}
void AveragedTurbine<Mu>::init_context( AssemblyContext& context )
{
context.get_element_fe(this->_flow_vars.u_var())->get_xyz();
context.get_element_fe(this->_flow_vars.u_var())->get_phi();
return;
}
void VelocityPenalty<Mu>::init_context( AssemblyContext& context )
{
context.get_element_fe(this->_flow_vars.u_var())->get_xyz();
context.get_element_fe(this->_flow_vars.u_var())->get_phi();
return;
}
void ParsedVelocitySource<Mu>::init_context( AssemblyContext& context )
{
context.get_element_fe(this->_flow_vars.u())->get_xyz();
context.get_element_fe(this->_flow_vars.u())->get_phi();
return;
}
void HeatConduction<K>::init_context( AssemblyContext& context )
{
// We should prerequest all the data
// we will need to build the linear system
// or evaluate a quantity of interest.
context.get_element_fe(_temp_vars.T_var())->get_JxW();
context.get_element_fe(_temp_vars.T_var())->get_phi();
context.get_element_fe(_temp_vars.T_var())->get_dphi();
context.get_element_fe(_temp_vars.T_var())->get_xyz();
context.get_side_fe(_temp_vars.T_var())->get_JxW();
context.get_side_fe(_temp_vars.T_var())->get_phi();
context.get_side_fe(_temp_vars.T_var())->get_dphi();
context.get_side_fe(_temp_vars.T_var())->get_xyz();
return;
}
void SpalartAllmarasStabilizationBase<Mu>::init_context( AssemblyContext& context )
{
// First call base class
SpalartAllmaras<Mu>::init_context(context);
// We also need second derivatives, so initialize those.
context.get_element_fe(this->_turbulence_vars.nu())->get_d2phi();
}
void LowMachNavierStokes<Mu,SH,TC>::assemble_energy_mass_residual( bool /*compute_jacobian*/,
AssemblyContext& context )
{
// Element Jacobian * quadrature weights for interior integration
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_T_var)->get_JxW();
// The shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& T_phi =
context.get_element_fe(this->_T_var)->get_phi();
// The number of local degrees of freedom in each variable
const unsigned int n_T_dofs = context.get_dof_indices(this->_T_var).size();
// The subvectors and submatrices we need to fill:
libMesh::DenseSubVector<libMesh::Real> &F_T = context.get_elem_residual(this->_T_var);
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp = 0; qp != n_qpoints; ++qp)
{
// For the mass residual, we need to be a little careful.
// The time integrator is handling the time-discretization
// for us so we need to supply M(u_fixed)*u for the residual.
// u_fixed will be given by the fixed_interior_* functions
// while u will be given by the interior_* functions.
libMesh::Real T_dot = context.interior_value(this->_T_var, qp);
libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
libMesh::Real cp = this->_cp(T);
libMesh::Number rho = this->rho(T, this->get_p0_transient(context, qp));
for (unsigned int i = 0; i != n_T_dofs; ++i)
{
F_T(i) += rho*cp*T_dot*T_phi[i][qp]*JxW[qp];
} // End DoF loop i
} // End quadrature loop qp
return;
}
void ConstantSourceTerm::element_time_derivative
( bool /*compute_jacobian*/, AssemblyContext & context )
{
for( std::vector<VariableIndex>::const_iterator v_it = _vars.begin();
v_it != _vars.end(); ++v_it )
{
VariableIndex var = *v_it;
// The number of local degrees of freedom in each variable.
const unsigned int n_dofs = context.get_dof_indices(var).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(var)->get_JxW();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& phi =
context.get_element_fe(var)->get_phi();
// Get residuals
libMesh::DenseSubVector<libMesh::Number> &F_var = context.get_elem_residual(var);
// Now we will build the element Jacobian and residual.
// Constructing the residual requires the solution and its
// gradient from the previous timestep. This must be
// calculated at each quadrature point by summing the
// solution degree-of-freedom values by the appropriate
// weight functions.
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
for (unsigned int i=0; i != n_dofs; i++)
{
F_var(i) += (this->_value)*phi[i][qp]*JxW[qp];
}
}
} // Variable loop
return;
}
void AxisymmetricHeatTransfer<Conductivity>::init_context( AssemblyContext& context )
{
// We should prerequest all the data
// we will need to build the linear system
// or evaluate a quantity of interest.
context.get_element_fe(_T_var)->get_JxW();
context.get_element_fe(_T_var)->get_phi();
context.get_element_fe(_T_var)->get_dphi();
context.get_element_fe(_T_var)->get_xyz();
context.get_side_fe(_T_var)->get_JxW();
context.get_side_fe(_T_var)->get_phi();
context.get_side_fe(_T_var)->get_dphi();
context.get_side_fe(_T_var)->get_xyz();
// _u_var is registered so can we assume things related to _u_var
// are available in FEMContext
return;
}
void IncompressibleNavierStokesBase<Mu>::init_context( AssemblyContext& context )
{
// We should prerequest all the data
// we will need to build the linear system
// or evaluate a quantity of interest.
context.get_element_fe(_flow_vars.u_var())->get_JxW();
context.get_element_fe(_flow_vars.u_var())->get_phi();
context.get_element_fe(_flow_vars.u_var())->get_dphi();
context.get_element_fe(_flow_vars.u_var())->get_xyz();
context.get_element_fe(_flow_vars.p_var())->get_phi();
context.get_element_fe(_flow_vars.p_var())->get_xyz();
context.get_side_fe(_flow_vars.u_var())->get_JxW();
context.get_side_fe(_flow_vars.u_var())->get_phi();
context.get_side_fe(_flow_vars.u_var())->get_dphi();
context.get_side_fe(_flow_vars.u_var())->get_xyz();
return;
}
void BoundaryConditions::pin_value( AssemblyContext& context,
const CachedValues& /*cache*/,
const bool request_jacobian,
const VariableIndex var,
const double pin_value,
const libMesh::Point& pin_location,
const double penalty )
{
if (context.get_elem().contains_point(pin_location))
{
libMesh::FEGenericBase<libMesh::Real>* elem_fe = NULL;
context.get_element_fe( var, elem_fe );
libMesh::DenseSubVector<libMesh::Number> &F_var = context.get_elem_residual(var); // residual
libMesh::DenseSubMatrix<libMesh::Number> &K_var = context.get_elem_jacobian(var,var); // jacobian
// The number of local degrees of freedom in p variable.
const unsigned int n_var_dofs = context.get_dof_indices(var).size();
libMesh::Number var_value = context.point_value(var, pin_location);
libMesh::FEType fe_type = elem_fe->get_fe_type();
libMesh::Point point_loc_in_masterelem =
libMesh::FEInterface::inverse_map(context.get_dim(), fe_type, &context.get_elem(), pin_location);
std::vector<libMesh::Real> phi(n_var_dofs);
for (unsigned int i=0; i != n_var_dofs; i++)
{
phi[i] = libMesh::FEInterface::shape( context.get_dim(), fe_type, &context.get_elem(), i,
point_loc_in_masterelem );
}
for (unsigned int i=0; i != n_var_dofs; i++)
{
F_var(i) += penalty*(var_value - pin_value)*phi[i];
/** \todo What the hell is the context.get_elem_solution_derivative() all about? */
if (request_jacobian && context.get_elem_solution_derivative())
{
libmesh_assert (context.get_elem_solution_derivative() == 1.0);
for (unsigned int j=0; j != n_var_dofs; j++)
K_var(i,j) += penalty*phi[i]*phi[j];
} // End if request_jacobian
} // End i loop
} // End if pin_location
return;
}
void LowMachNavierStokes<Mu,SH,TC>::assemble_thermo_press_elem_time_deriv( bool /*compute_jacobian*/,
AssemblyContext& context )
{
// Element Jacobian * quadrature weights for interior integration
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_T_var)->get_JxW();
// The number of local degrees of freedom in each variable
const unsigned int n_p0_dofs = context.get_dof_indices(this->_p0_var).size();
// The subvectors and submatrices we need to fill:
libMesh::DenseSubVector<libMesh::Real> &F_p0 = context.get_elem_residual(this->_p0_var);
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp = 0; qp != n_qpoints; ++qp)
{
libMesh::Number T;
T = context.interior_value(this->_T_var, qp);
libMesh::Gradient grad_u, grad_v, grad_w;
grad_u = context.interior_gradient(this->_u_var, qp);
grad_v = context.interior_gradient(this->_v_var, qp);
if (this->_dim == 3)
grad_w = context.interior_gradient(this->_w_var, qp);
libMesh::Number divU = grad_u(0) + grad_v(1);
if(this->_dim==3)
divU += grad_w(2);
//libMesh::Number cp = this->_cp(T);
//libMesh::Number cv = cp + this->_R;
//libMesh::Number gamma = cp/cv;
//libMesh::Number gamma_ratio = gamma/(gamma-1.0);
libMesh::Number p0 = context.interior_value( this->_p0_var, qp );
for (unsigned int i = 0; i != n_p0_dofs; ++i)
{
F_p0(i) += (p0/T - this->_p0/this->_T0)*JxW[qp];
//F_p0(i) -= p0*gamma_ratio*divU*JxW[qp];
} // End DoF loop i
}
return;
}
void BoussinesqBuoyancy::element_time_derivative
( bool compute_jacobian,
AssemblyContext & context )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_u_dofs = context.get_dof_indices(_flow_vars.u()).size();
const unsigned int n_T_dofs = context.get_dof_indices(_temp_vars.T()).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(_flow_vars.u())->get_JxW();
// The velocity shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& vel_phi =
context.get_element_fe(_flow_vars.u())->get_phi();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& T_phi =
context.get_element_fe(_temp_vars.T())->get_phi();
// Get residuals
libMesh::DenseSubVector<libMesh::Number> &Fu = context.get_elem_residual(_flow_vars.u()); // R_{u}
libMesh::DenseSubVector<libMesh::Number> &Fv = context.get_elem_residual(_flow_vars.v()); // R_{v}
libMesh::DenseSubVector<libMesh::Number>* Fw = NULL;
// Get Jacobians
libMesh::DenseSubMatrix<libMesh::Number> &KuT = context.get_elem_jacobian(_flow_vars.u(), _temp_vars.T()); // R_{u},{T}
libMesh::DenseSubMatrix<libMesh::Number> &KvT = context.get_elem_jacobian(_flow_vars.v(), _temp_vars.T()); // R_{v},{T}
libMesh::DenseSubMatrix<libMesh::Number>* KwT = NULL;
if( this->_flow_vars.dim() == 3 )
{
Fw = &context.get_elem_residual(_flow_vars.w()); // R_{w}
KwT = &context.get_elem_jacobian(_flow_vars.w(), _temp_vars.T()); // R_{w},{T}
}
// Now we will build the element Jacobian and residual.
// Constructing the residual requires the solution and its
// gradient from the previous timestep. This must be
// calculated at each quadrature point by summing the
// solution degree-of-freedom values by the appropriate
// weight functions.
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
// Compute the solution & its gradient at the old Newton iterate.
libMesh::Number T;
T = context.interior_value(_temp_vars.T(), qp);
// First, an i-loop over the velocity degrees of freedom.
// We know that n_u_dofs == n_v_dofs so we can compute contributions
// for both at the same time.
for (unsigned int i=0; i != n_u_dofs; i++)
{
Fu(i) += -_rho*_beta_T*(T - _T_ref)*_g(0)*vel_phi[i][qp]*JxW[qp];
Fv(i) += -_rho*_beta_T*(T - _T_ref)*_g(1)*vel_phi[i][qp]*JxW[qp];
if (this->_flow_vars.dim() == 3)
(*Fw)(i) += -_rho*_beta_T*(T - _T_ref)*_g(2)*vel_phi[i][qp]*JxW[qp];
if (compute_jacobian)
{
for (unsigned int j=0; j != n_T_dofs; j++)
{
KuT(i,j) += context.get_elem_solution_derivative() *
-_rho*_beta_T*_g(0)*vel_phi[i][qp]*T_phi[j][qp]*JxW[qp];
KvT(i,j) += context.get_elem_solution_derivative() *
-_rho*_beta_T*_g(1)*vel_phi[i][qp]*T_phi[j][qp]*JxW[qp];
if (this->_flow_vars.dim() == 3)
(*KwT)(i,j) += context.get_elem_solution_derivative() *
-_rho*_beta_T*_g(2)*vel_phi[i][qp]*T_phi[j][qp]*JxW[qp];
} // End j dof loop
} // End compute_jacobian check
} // End i dof loop
} // End quadrature loop
}
void AveragedTurbine<Mu>::element_time_derivative( bool compute_jacobian,
AssemblyContext& context,
CachedValues& /* cache */ )
{
#ifdef GRINS_USE_GRVY_TIMERS
this->_timer->BeginTimer("AveragedTurbine::element_time_derivative");
#endif
// Element Jacobian * quadrature weights for interior integration
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_flow_vars.u())->get_JxW();
// The shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& u_phi =
context.get_element_fe(this->_flow_vars.u())->get_phi();
const std::vector<libMesh::Point>& u_qpoint =
context.get_element_fe(this->_flow_vars.u())->get_xyz();
// The number of local degrees of freedom in each variable
const unsigned int n_u_dofs = context.get_dof_indices(this->_flow_vars.u()).size();
// The subvectors and submatrices we need to fill:
libMesh::DenseSubMatrix<libMesh::Number> &Kuu = context.get_elem_jacobian(this->_flow_vars.u(), this->_flow_vars.u()); // R_{u},{u}
libMesh::DenseSubMatrix<libMesh::Number> &Kuv = context.get_elem_jacobian(this->_flow_vars.u(), this->_flow_vars.v()); // R_{u},{v}
libMesh::DenseSubMatrix<libMesh::Number> &Kvu = context.get_elem_jacobian(this->_flow_vars.v(), this->_flow_vars.u()); // R_{v},{u}
libMesh::DenseSubMatrix<libMesh::Number> &Kvv = context.get_elem_jacobian(this->_flow_vars.v(), this->_flow_vars.v()); // R_{v},{v}
libMesh::DenseSubMatrix<libMesh::Number> &Kus =
context.get_elem_jacobian(this->_flow_vars.u(),
this->fan_speed_var()); // R_{u},{s}
libMesh::DenseSubMatrix<libMesh::Number> &Ksu =
context.get_elem_jacobian(this->fan_speed_var(),
this->_flow_vars.u()); // R_{s},{u}
libMesh::DenseSubMatrix<libMesh::Number> &Kvs =
context.get_elem_jacobian(this->_flow_vars.v(),
this->fan_speed_var()); // R_{v},{s}
libMesh::DenseSubMatrix<libMesh::Number> &Ksv =
context.get_elem_jacobian(this->fan_speed_var(),
this->_flow_vars.v()); // R_{s},{v}
libMesh::DenseSubMatrix<libMesh::Number> &Kss =
context.get_elem_jacobian(this->fan_speed_var(),
this->fan_speed_var()); // R_{s},{s}
libMesh::DenseSubMatrix<libMesh::Number>* Kwu = NULL;
libMesh::DenseSubMatrix<libMesh::Number>* Kwv = NULL;
libMesh::DenseSubMatrix<libMesh::Number>* Kww = NULL;
libMesh::DenseSubMatrix<libMesh::Number>* Kuw = NULL;
libMesh::DenseSubMatrix<libMesh::Number>* Kvw = NULL;
libMesh::DenseSubMatrix<libMesh::Number>* Ksw = NULL;
libMesh::DenseSubMatrix<libMesh::Number>* Kws = NULL;
libMesh::DenseSubVector<libMesh::Number> &Fu = context.get_elem_residual(this->_flow_vars.u()); // R_{u}
libMesh::DenseSubVector<libMesh::Number> &Fv = context.get_elem_residual(this->_flow_vars.v()); // R_{v}
libMesh::DenseSubVector<libMesh::Number>* Fw = NULL;
libMesh::DenseSubVector<libMesh::Number> &Fs = context.get_elem_residual(this->fan_speed_var()); // R_{s}
if( this->mesh_dim(context) == 3 )
{
Kuw = &context.get_elem_jacobian(this->_flow_vars.u(), this->_flow_vars.w()); // R_{u},{w}
Kvw = &context.get_elem_jacobian(this->_flow_vars.v(), this->_flow_vars.w()); // R_{v},{w}
Kwu = &context.get_elem_jacobian(this->_flow_vars.w(), this->_flow_vars.u()); // R_{w},{u}
Kwv = &context.get_elem_jacobian(this->_flow_vars.w(), this->_flow_vars.v()); // R_{w},{v}
Kww = &context.get_elem_jacobian(this->_flow_vars.w(), this->_flow_vars.w()); // R_{w},{w}
Fw = &context.get_elem_residual(this->_flow_vars.w()); // R_{w}
Ksw = &context.get_elem_jacobian(this->fan_speed_var(), this->_flow_vars.w()); // R_{s},{w}
Kws = &context.get_elem_jacobian(this->_flow_vars.w(), this->fan_speed_var()); // R_{w},{s}
Fw = &context.get_elem_residual(this->_flow_vars.w()); // R_{w}
}
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
// Compute the solution at the old Newton iterate.
libMesh::Number u, v, s;
u = context.interior_value(this->_flow_vars.u(), qp);
v = context.interior_value(this->_flow_vars.v(), qp);
s = context.interior_value(this->fan_speed_var(), qp);
libMesh::NumberVectorValue U(u,v);
if (this->mesh_dim(context) == 3)
U(2) = context.interior_value(this->_flow_vars.w(), qp); // w
libMesh::NumberVectorValue U_B_1;
libMesh::NumberVectorValue F;
libMesh::NumberTensorValue dFdU;
libMesh::NumberTensorValue* dFdU_ptr =
compute_jacobian ? &dFdU : NULL;
libMesh::NumberVectorValue dFds;
libMesh::NumberVectorValue* dFds_ptr =
compute_jacobian ? &dFds : NULL;
if (!this->compute_force(u_qpoint[qp], context.time, U, s,
U_B_1, F, dFdU_ptr, dFds_ptr))
continue;
libMesh::Real jac = JxW[qp];
// Using this dot product to derive torque *depends* on s=1
// and U_B_1 corresponding to 1 rad/sec base velocity; this
// means that the length of U_B_1 is equal to radius.
// F is the force on the air, so *negative* F is the force on
// the turbine.
Fs(0) -= U_B_1 * F * jac;
if (compute_jacobian)
{
Kss(0,0) -= U_B_1 * dFds * jac;
for (unsigned int j=0; j != n_u_dofs; j++)
{
libMesh::Real jac_j = JxW[qp] * u_phi[j][qp];
for (unsigned int d=0; d != 3; ++d)
{
Ksu(0,j) -= jac_j * U_B_1(d) * dFdU(d,0);
Ksv(0,j) -= jac_j * U_B_1(d) * dFdU(d,1);
}
if (this->mesh_dim(context) == 3)
{
for (unsigned int d=0; d != 3; ++d)
(*Ksw)(0,j) -= jac_j * U_B_1(d) * dFdU(d,2);
}
} // End j dof loop
}
for (unsigned int i=0; i != n_u_dofs; i++)
{
const libMesh::Number jac_i = jac * u_phi[i][qp];
Fu(i) += F(0)*jac_i;
Fv(i) += F(1)*jac_i;
if( this->mesh_dim(context) == 3 )
(*Fw)(i) += F(2)*jac_i;
if( compute_jacobian )
{
Kus(i,0) += dFds(0) * jac_i;
Kvs(i,0) += dFds(1) * jac_i;
if( this->mesh_dim(context) == 3 )
(*Kws)(i,0) += dFds(2) * jac_i;
for (unsigned int j=0; j != n_u_dofs; j++)
{
const libMesh::Number jac_ij = jac_i * u_phi[j][qp];
Kuu(i,j) += jac_ij * dFdU(0,0);
Kuv(i,j) += jac_ij * dFdU(0,1);
Kvu(i,j) += jac_ij * dFdU(1,0);
Kvv(i,j) += jac_ij * dFdU(1,1);
if( this->mesh_dim(context) == 3 )
{
(*Kuw)(i,j) += jac_ij * dFdU(0,2);
(*Kvw)(i,j) += jac_ij * dFdU(1,2);
(*Kwu)(i,j) += jac_ij * dFdU(2,0);
(*Kwv)(i,j) += jac_ij * dFdU(2,1);
(*Kww)(i,j) += jac_ij * dFdU(2,2);
}
}
}
}
}
#ifdef GRINS_USE_GRVY_TIMERS
this->_timer->EndTimer("AveragedTurbine::element_time_derivative");
#endif
return;
}
void SpalartAllmarasSPGSMStabilization<Mu>::element_time_derivative
( bool compute_jacobian,
AssemblyContext & context )
{
// Get a pointer to the current element, we need this for computing the distance to wall for the
// quadrature points
libMesh::Elem &elem_pointer = context.get_elem();
// The number of local degrees of freedom in each variable.
const unsigned int n_nu_dofs = context.get_dof_indices(this->_turbulence_vars.nu()).size();
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_turbulence_vars.nu())->get_JxW();
// The viscosity shape function gradients (in global coords.)
// at interior quadrature points.
const std::vector<std::vector<libMesh::RealGradient> >& nu_gradphi =
context.get_element_fe(this->_turbulence_vars.nu())->get_dphi();
// Quadrature point locations
//const std::vector<libMesh::Point>& nu_qpoint =
//context.get_element_fe(this->_turbulence_vars.nu())->get_xyz();
//libMesh::DenseSubMatrix<libMesh::Number> &Knunu = context.get_elem_jacobian(this->_turbulence_vars.nu(), this->_turbulence_vars.nu()); // R_{nu},{nu}
libMesh::DenseSubVector<libMesh::Number> &Fnu = context.get_elem_residual(this->_turbulence_vars.nu()); // R_{nu}
libMesh::FEBase* fe = context.get_element_fe(this->_turbulence_vars.nu());
unsigned int n_qpoints = context.get_element_qrule().n_points();
// Auto pointer to distance fcn evaluated at quad points
std::unique_ptr< libMesh::DenseVector<libMesh::Real> > distance_qp;
// Fill the vector of distances to quadrature points
distance_qp = this->distance_function->interpolate(&elem_pointer, context.get_element_qrule().get_points());
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::Gradient grad_nu;
grad_nu = context.interior_gradient(this->_turbulence_vars.nu(), qp);
libMesh::Real jac = JxW[qp];
// The physical viscosity
libMesh::Real _mu_qp = this->_mu(context, qp);
// To be fixed
// For the channel flow we will just set the distance function analytically
//(*distance_qp)(qp) = std::min(fabs(y),fabs(1 - y));
// The flow velocity
libMesh::Number u,v;
u = context.interior_value(this->_flow_vars.u(), qp);
v = context.interior_value(this->_flow_vars.v(), qp);
libMesh::NumberVectorValue U(u,v);
if (this->_flow_vars.dim() == 3)
U(2) = context.interior_value(this->_flow_vars.w(), qp);
// Stabilization terms
libMesh::RealGradient g = this->_stab_helper.compute_g( fe, context, qp );
libMesh::RealTensor G = this->_stab_helper.compute_G( fe, context, qp );
libMesh::Real tau_spalart = this->_stab_helper.compute_tau_spalart( context, qp, g, G, this->_rho, U, _mu_qp, this->_is_steady );
libMesh::Number RM_spalart = this->_stab_helper.compute_res_spalart_steady( context, qp, this->_rho, _mu_qp, (*distance_qp)(qp), this->_infinite_distance );
for (unsigned int i=0; i != n_nu_dofs; i++)
{
Fnu(i) += jac*( -tau_spalart*RM_spalart*this->_rho*(U*nu_gradphi[i][qp]) );
}
if( compute_jacobian )
{
libmesh_not_implemented();
}
}
}
void LowMachNavierStokes<Mu,SH,TC>::assemble_momentum_mass_residual( bool /*compute_jacobian*/,
AssemblyContext& context )
{
// Element Jacobian * quadrature weights for interior integration
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_u_var)->get_JxW();
// The shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& u_phi =
context.get_element_fe(this->_u_var)->get_phi();
// The number of local degrees of freedom in each variable
const unsigned int n_u_dofs = context.get_dof_indices(this->_u_var).size();
// for convenience
if (this->_dim != 3)
this->_w_var = this->_u_var;
// The subvectors and submatrices we need to fill:
libMesh::DenseSubVector<libMesh::Real> &F_u = context.get_elem_residual(this->_u_var);
libMesh::DenseSubVector<libMesh::Real> &F_v = context.get_elem_residual(this->_v_var);
libMesh::DenseSubVector<libMesh::Real> &F_w = context.get_elem_residual(this->_w_var);
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp = 0; qp != n_qpoints; ++qp)
{
// For the mass residual, we need to be a little careful.
// The time integrator is handling the time-discretization
// for us so we need to supply M(u_fixed)*u for the residual.
// u_fixed will be given by the fixed_interior_* functions
// while u will be given by the interior_* functions.
libMesh::Real u_dot = context.interior_value(this->_u_var, qp);
libMesh::Real v_dot = context.interior_value(this->_v_var, qp);
libMesh::Real w_dot = 0.0;
if( this->_dim == 3 )
w_dot = context.interior_value(this->_w_var, qp);
libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
libMesh::Number rho = this->rho(T, this->get_p0_transient(context, qp));
for (unsigned int i = 0; i != n_u_dofs; ++i)
{
F_u(i) += rho*u_dot*u_phi[i][qp]*JxW[qp];
F_v(i) += rho*v_dot*u_phi[i][qp]*JxW[qp];
if( this->_dim == 3 )
F_w(i) += rho*w_dot*u_phi[i][qp]*JxW[qp];
/*
if( compute_jacobian )
{
for (unsigned int j=0; j != n_u_dofs; j++)
{
// Assuming rho is constant w.r.t. u, v, w
// and T (if Boussinesq added).
libMesh::Real value = JxW[qp]*_rho*u_phi[i][qp]*u_phi[j][qp];
M_uu(i,j) += value;
M_vv(i,j) += value;
if( _dim == 3)
{
M_ww(i,j) += value;
}
} // End DoF loop j
} // End Jacobian check
*/
} // End DoF loop i
} // End quadrature loop qp
return;
}
void AxisymmetricHeatTransfer<Conductivity>::element_time_derivative( bool compute_jacobian,
AssemblyContext& context,
CachedValues& /*cache*/ )
{
#ifdef GRINS_USE_GRVY_TIMERS
this->_timer->BeginTimer("AxisymmetricHeatTransfer::element_time_derivative");
#endif
// The number of local degrees of freedom in each variable.
const unsigned int n_T_dofs = context.get_dof_indices(_T_var).size();
const unsigned int n_u_dofs = context.get_dof_indices(_u_r_var).size();
//TODO: check n_T_dofs is same as n_u_dofs, n_v_dofs, n_w_dofs
// We get some references to cell-specific data that
// will be used to assemble the linear system.
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(_T_var)->get_JxW();
// The temperature shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& T_phi =
context.get_element_fe(_T_var)->get_phi();
// The velocity shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& vel_phi =
context.get_element_fe(_u_r_var)->get_phi();
// The temperature shape function gradients (in global coords.)
// at interior quadrature points.
const std::vector<std::vector<libMesh::RealGradient> >& T_gradphi =
context.get_element_fe(_T_var)->get_dphi();
// Physical location of the quadrature points
const std::vector<libMesh::Point>& u_qpoint =
context.get_element_fe(_u_r_var)->get_xyz();
// The subvectors and submatrices we need to fill:
libMesh::DenseSubVector<libMesh::Number> &FT = context.get_elem_residual(_T_var); // R_{T}
libMesh::DenseSubMatrix<libMesh::Number> &KTT = context.get_elem_jacobian(_T_var, _T_var); // R_{T},{T}
libMesh::DenseSubMatrix<libMesh::Number> &KTr = context.get_elem_jacobian(_T_var, _u_r_var); // R_{T},{r}
libMesh::DenseSubMatrix<libMesh::Number> &KTz = context.get_elem_jacobian(_T_var, _u_z_var); // R_{T},{z}
// Now we will build the element Jacobian and residual.
// Constructing the residual requires the solution and its
// gradient from the previous timestep. This must be
// calculated at each quadrature point by summing the
// solution degree-of-freedom values by the appropriate
// weight functions.
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
const libMesh::Number r = u_qpoint[qp](0);
// Compute the solution & its gradient at the old Newton iterate.
libMesh::Number u_r, u_z;
u_r = context.interior_value(_u_r_var, qp);
u_z = context.interior_value(_u_z_var, qp);
libMesh::Gradient grad_T;
grad_T = context.interior_gradient(_T_var, qp);
libMesh::NumberVectorValue U (u_r,u_z);
libMesh::Number k = this->_k( context, qp );
// FIXME - once we have T-dependent k, we'll need its
// derivatives in Jacobians
// libMesh::Number dk_dT = this->_k.deriv( T );
// First, an i-loop over the degrees of freedom.
for (unsigned int i=0; i != n_T_dofs; i++)
{
FT(i) += JxW[qp]*r*
(-_rho*_Cp*T_phi[i][qp]*(U*grad_T) // convection term
-k*(T_gradphi[i][qp]*grad_T) ); // diffusion term
if (compute_jacobian)
{
libmesh_assert (context.get_elem_solution_derivative() == 1.0);
for (unsigned int j=0; j != n_T_dofs; j++)
{
// TODO: precompute some terms like:
// _rho*_Cp*T_phi[i][qp]*(vel_phi[j][qp]*T_grad_phi[j][qp])
KTT(i,j) += JxW[qp] * context.get_elem_solution_derivative() *r*
(-_rho*_Cp*T_phi[i][qp]*(U*T_gradphi[j][qp]) // convection term
-k*(T_gradphi[i][qp]*T_gradphi[j][qp])); // diffusion term
} // end of the inner dof (j) loop
#if 0
if( dk_dT != 0.0 )
{
for (unsigned int j=0; j != n_T_dofs; j++)
{
// TODO: precompute some terms like:
KTT(i,j) -= JxW[qp] * context.get_elem_solution_derivative() *r*( dk_dT*T_phi[j][qp]*T_gradphi[i][qp]*grad_T );
}
}
#endif
// Matrix contributions for the Tu, Tv and Tw couplings (n_T_dofs same as n_u_dofs, n_v_dofs and n_w_dofs)
for (unsigned int j=0; j != n_u_dofs; j++)
{
KTr(i,j) += JxW[qp] * context.get_elem_solution_derivative() *r*(-_rho*_Cp*T_phi[i][qp]*(vel_phi[j][qp]*grad_T(0)));
KTz(i,j) += JxW[qp] * context.get_elem_solution_derivative() *r*(-_rho*_Cp*T_phi[i][qp]*(vel_phi[j][qp]*grad_T(1)));
} // end of the inner dof (j) loop
} // end - if (compute_jacobian && context.get_elem_solution_derivative())
} // end of the outer dof (i) loop
} // end of the quadrature point (qp) loop
#ifdef GRINS_USE_GRVY_TIMERS
this->_timer->EndTimer("AxisymmetricHeatTransfer::element_time_derivative");
#endif
return;
}
void LowMachNavierStokes<Mu,SH,TC>::assemble_momentum_time_deriv( bool /*compute_jacobian*/,
AssemblyContext& context,
CachedValues& cache )
{
// The number of local degrees of freedom in each variable.
const unsigned int n_u_dofs = context.get_dof_indices(this->_u_var).size();
// Check number of dofs is same for _u_var, v_var and w_var.
libmesh_assert (n_u_dofs == context.get_dof_indices(this->_v_var).size());
if (this->_dim == 3)
libmesh_assert (n_u_dofs == context.get_dof_indices(this->_w_var).size());
// Element Jacobian * quadrature weights for interior integration.
const std::vector<libMesh::Real> &JxW =
context.get_element_fe(this->_u_var)->get_JxW();
// The pressure shape functions at interior quadrature points.
const std::vector<std::vector<libMesh::Real> >& u_phi =
context.get_element_fe(this->_u_var)->get_phi();
// The velocity shape function gradients at interior quadrature points.
const std::vector<std::vector<libMesh::RealGradient> >& u_gradphi =
context.get_element_fe(this->_u_var)->get_dphi();
libMesh::DenseSubVector<libMesh::Number> &Fu = context.get_elem_residual(this->_u_var); // R_{u}
libMesh::DenseSubVector<libMesh::Number> &Fv = context.get_elem_residual(this->_v_var); // R_{v}
libMesh::DenseSubVector<libMesh::Number> &Fw = context.get_elem_residual(this->_w_var); // R_{w}
unsigned int n_qpoints = context.get_element_qrule().n_points();
for (unsigned int qp=0; qp != n_qpoints; qp++)
{
libMesh::Number u, v, p, p0, T;
u = cache.get_cached_values(Cache::X_VELOCITY)[qp];
v = cache.get_cached_values(Cache::Y_VELOCITY)[qp];
T = cache.get_cached_values(Cache::TEMPERATURE)[qp];
p = cache.get_cached_values(Cache::PRESSURE)[qp];
p0 = cache.get_cached_values(Cache::THERMO_PRESSURE)[qp];
libMesh::Gradient grad_u = cache.get_cached_gradient_values(Cache::X_VELOCITY_GRAD)[qp];
libMesh::Gradient grad_v = cache.get_cached_gradient_values(Cache::Y_VELOCITY_GRAD)[qp];
libMesh::Gradient grad_w;
if (this->_dim == 3)
grad_w = cache.get_cached_gradient_values(Cache::Z_VELOCITY_GRAD)[qp];
libMesh::NumberVectorValue grad_uT( grad_u(0), grad_v(0) );
libMesh::NumberVectorValue grad_vT( grad_u(1), grad_v(1) );
libMesh::NumberVectorValue grad_wT;
if( this->_dim == 3 )
{
grad_uT(2) = grad_w(0);
grad_vT(2) = grad_w(1);
grad_wT = libMesh::NumberVectorValue( grad_u(2), grad_v(2), grad_w(2) );
}
libMesh::NumberVectorValue U(u,v);
if (this->_dim == 3)
U(2) = cache.get_cached_values(Cache::Z_VELOCITY)[qp]; // w
libMesh::Number divU = grad_u(0) + grad_v(1);
if (this->_dim == 3)
divU += grad_w(2);
libMesh::Number rho = this->rho( T, p0 );
// Now a loop over the pressure degrees of freedom. This
// computes the contributions of the continuity equation.
for (unsigned int i=0; i != n_u_dofs; i++)
{
Fu(i) += ( -rho*U*grad_u*u_phi[i][qp] // convection term
+ p*u_gradphi[i][qp](0) // pressure term
- this->_mu(T)*(u_gradphi[i][qp]*grad_u + u_gradphi[i][qp]*grad_uT
- 2.0/3.0*divU*u_gradphi[i][qp](0) ) // diffusion term
+ rho*this->_g(0)*u_phi[i][qp] // hydrostatic term
)*JxW[qp];
Fv(i) += ( -rho*U*grad_v*u_phi[i][qp] // convection term
+ p*u_gradphi[i][qp](1) // pressure term
- this->_mu(T)*(u_gradphi[i][qp]*grad_v + u_gradphi[i][qp]*grad_vT
- 2.0/3.0*divU*u_gradphi[i][qp](1) ) // diffusion term
+ rho*this->_g(1)*u_phi[i][qp] // hydrostatic term
)*JxW[qp];
if (this->_dim == 3)
{
Fw(i) += ( -rho*U*grad_w*u_phi[i][qp] // convection term
+ p*u_gradphi[i][qp](2) // pressure term
- this->_mu(T)*(u_gradphi[i][qp]*grad_w + u_gradphi[i][qp]*grad_wT
- 2.0/3.0*divU*u_gradphi[i][qp](2) ) // diffusion term
+ rho*this->_g(2)*u_phi[i][qp] // hydrostatic term
)*JxW[qp];
}
/*
if (compute_jacobian && context.get_elem_solution_derivative())
{
libmesh_assert (context.get_elem_solution_derivative() == 1.0);
for (unsigned int j=0; j != n_u_dofs; j++)
{
// TODO: precompute some terms like:
// (Uvec*vel_gblgradphivec[j][qp]),
// vel_phi[i][qp]*vel_phi[j][qp],
// (vel_gblgradphivec[i][qp]*vel_gblgradphivec[j][qp])
Kuu(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*(Uvec*vel_gblgradphivec[j][qp]) // convection term
-_rho*vel_phi[i][qp]*graduvec_x*vel_phi[j][qp] // convection term
-_mu*(vel_gblgradphivec[i][qp]*vel_gblgradphivec[j][qp])); // diffusion term
Kuv(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*graduvec_y*vel_phi[j][qp]); // convection term
Kvv(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*(Uvec*vel_gblgradphivec[j][qp]) // convection term
-_rho*vel_phi[i][qp]*gradvvec_y*vel_phi[j][qp] // convection term
-_mu*(vel_gblgradphivec[i][qp]*vel_gblgradphivec[j][qp])); // diffusion term
Kvu(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*gradvvec_x*vel_phi[j][qp]); // convection term
if (_dim == 3)
{
Kuw(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*graduvec_z*vel_phi[j][qp]); // convection term
Kvw(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*gradvvec_z*vel_phi[j][qp]); // convection term
Kww(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*(Uvec*vel_gblgradphivec[j][qp]) // convection term
-_rho*vel_phi[i][qp]*gradwvec_z*vel_phi[j][qp] // convection term
-_mu*(vel_gblgradphivec[i][qp]*vel_gblgradphivec[j][qp])); // diffusion term
Kwu(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*gradwvec_x*vel_phi[j][qp]); // convection term
Kwv(i,j) += JxW[qp] *
(-_rho*vel_phi[i][qp]*gradwvec_y*vel_phi[j][qp]); // convection term
}
} // end of the inner dof (j) loop
// Matrix contributions for the up, vp and wp couplings
for (unsigned int j=0; j != n_p_dofs; j++)
{
Kup(i,j) += JxW[qp]*vel_gblgradphivec[i][qp](0)*p_phi[j][qp];
Kvp(i,j) += JxW[qp]*vel_gblgradphivec[i][qp](1)*p_phi[j][qp];
if (_dim == 3)
Kwp(i,j) += JxW[qp]*vel_gblgradphivec[i][qp](2)*p_phi[j][qp];
} // end of the inner dof (j) loop
} // end - if (compute_jacobian && context.get_elem_solution_derivative())
} // end of the outer dof (i) loop
} // end of the quadrature point (qp) loop
*/
} // End of DoF loop i
} // End quadrature loop qp
return;
}
