void CFDDataPack::reinitViscous()
{
grad_rho = duh[0];
grad_mom = RealTensor(duh[1], duh[2], duh[3]);
for (int a = 0; a < 3; ++a)
for (int b = 0; b < 3; ++b)
grad_vel(a, b) = (grad_mom(a, b) - vel(a)*grad_rho(b))/r;
tau = grad_vel + grad_vel.transpose();
vel_div = grad_vel.tr();
tau(0, 0) -= 2./3*vel_div; tau(1, 1) -= 2./3*vel_div; tau(2, 2) -= 2./3*vel_div;
if(_cfd_problem._vis_type == 0) vis = 0.0;
else if(_cfd_problem._vis_type == 1) vis = 1.0;
else if(_cfd_problem._vis_type == 2)
{
Real t_ref(288), t_s(110.4);
vis = pow(t/t_ref, 1.5)*(t_ref+t_s)/(t+t_s);
}
else mooseError("不可知的粘性模型");
tau *= vis/_reynolds;
grad_enthalpy = (duh[4]-uh[4]/uh[0] * duh[0])/r - grad_vel.transpose() * vel;
grad_enthalpy *= (vis/_reynolds)*(_gamma/_prandtl);
invis_flux[0] = r*vel;
invis_flux[1] = mom(0)*vel;
invis_flux[1](0) += p;
invis_flux[2] = mom(1)*vel;
invis_flux[2](1) += p;
invis_flux[3] = mom(2)*vel;
invis_flux[3](2) += p;
invis_flux[4] = r*h*vel;
vis_flux[0].zero();
vis_flux[1] = tau.row(0);
vis_flux[2] = tau.row(1);
vis_flux[3] = tau.row(2);
vis_flux[4] = tau * vel + grad_enthalpy;
}
bool
DisplacedProblem::reinitDirac(const Elem * elem, THREAD_ID tid)
{
std::vector<Point> & points = _dirac_kernel_info.getPoints()[elem];
unsigned int n_points = points.size();
if (n_points)
{
unsigned int max_qps = _mproblem.getMaxQps();
if (n_points > max_qps)
{
/**
* The maximum number of qps can rise if several Dirac points are added to a single element.
* In that case we need to resize the zeros to compensate.
*/
for (unsigned int tid = 0; tid < libMesh::n_threads(); ++tid)
{
_zero[tid].resize(max_qps, 0);
_grad_zero[tid].resize(max_qps, 0);
_second_zero[tid].resize(max_qps, RealTensor(0.));
_second_phi_zero[tid].resize(max_qps, std::vector<RealTensor>(_mproblem.getMaxShapeFunctions(), RealTensor(0.)));
}
}
_assembly[tid]->reinitAtPhysical(elem, points);
_displaced_nl.prepare(tid);
_displaced_aux.prepare(tid);
reinitElem(elem, tid);
}
_assembly[tid]->prepare();
return n_points > 0;
}
