void ExplicitModelEvaluator<Scalar>::
buildInverseMassMatrix() const
{
typedef Thyra::ModelEvaluatorBase MEB;
using Teuchos::RCP;
using Thyra::createMember;
RCP<const Thyra::ModelEvaluator<Scalar> > me = this->getUnderlyingModel();
// first allocate space for the mass matrix
RCP<Thyra::LinearOpBase<Scalar> > mass = me->create_W_op();
// intialize a zero to get rid of the x-dot
if(zero_==Teuchos::null) {
zero_ = Thyra::createMember(*me->get_x_space());
Thyra::assign(zero_.ptr(),0.0);
}
// request only the mass matrix from the physics
// Model evaluator builds: alpha*u_dot + beta*F(u) = 0
MEB::InArgs<Scalar> inArgs = me->createInArgs();
inArgs.set_x(createMember(me->get_x_space()));
inArgs.set_x_dot(zero_);
inArgs.set_alpha(-1.0);
inArgs.set_beta(0.0);
// set the one time beta to ensure dirichlet conditions
// are correctly included in the mass matrix: do it for
// both epetra and Tpetra. If a panzer model evaluator has
// not been passed in...oh well you get what you asked for!
if(panzerModel_!=Teuchos::null)
panzerModel_->setOneTimeDirichletBeta(-1.0);
else if(panzerEpetraModel_!=Teuchos::null)
panzerEpetraModel_->setOneTimeDirichletBeta(-1.0);
// set only the mass matrix
MEB::OutArgs<Scalar> outArgs = me->createOutArgs();
outArgs.set_W_op(mass);
// this will fill the mass matrix operator
me->evalModel(inArgs,outArgs);
if(!massLumping_) {
invMassMatrix_ = Thyra::inverse<Scalar>(*me->get_W_factory(),mass);
}
else {
// build lumped mass matrix (assumes all positive mass entries, does a simple sum)
Teuchos::RCP<Thyra::VectorBase<Scalar> > ones = Thyra::createMember(*mass->domain());
Thyra::assign(ones.ptr(),1.0);
RCP<Thyra::VectorBase<Scalar> > invLumpMass = Thyra::createMember(*mass->range());
Thyra::apply(*mass,Thyra::NOTRANS,*ones,invLumpMass.ptr());
Thyra::reciprocal(*invLumpMass,invLumpMass.ptr());
invMassMatrix_ = Thyra::diagonal(invLumpMass);
}
}
void ForwardSensitivityExplicitModelEvaluator<Scalar>::computeDerivativeMatrices(
const Thyra::ModelEvaluatorBase::InArgs<Scalar> &point
) const
{
TEUCHOS_ASSERT( !is_null(stateModel_) );
typedef Thyra::ModelEvaluatorBase MEB;
typedef Teuchos::VerboseObjectTempState<MEB> VOTSME;
Teuchos::RCP<Teuchos::FancyOStream> out = this->getOStream();
Teuchos::EVerbosityLevel verbLevel = this->getVerbLevel();
MEB::InArgs<Scalar> inArgs = stateBasePoint_;
MEB::OutArgs<Scalar> outArgs = stateModel_->createOutArgs();
if (is_null(DfDx_)) {
DfDx_ = stateModel_->create_W_op();
}
if (inArgs.supports(MEB::IN_ARG_beta)) {
inArgs.set_beta(1.0);
}
outArgs.set_W_op(DfDx_);
if (is_null(DfDp_)) {
DfDp_ = Thyra::create_DfDp_mv(
*stateModel_,p_index_,
MEB::DERIV_MV_BY_COL
).getMultiVector();
}
outArgs.set_DfDp(
p_index_,
MEB::Derivative<Scalar>(DfDp_,MEB::DERIV_MV_BY_COL)
);
VOTSME stateModel_outputTempState(stateModel_,out,verbLevel);
stateModel_->evalModel(inArgs,outArgs);
}
void DiagonalImplicitRKModelEvaluator<Scalar>::evalModelImpl(
const Thyra::ModelEvaluatorBase::InArgs<Scalar>& inArgs_stage,
const Thyra::ModelEvaluatorBase::OutArgs<Scalar>& outArgs_stage
) const
{
typedef ScalarTraits<Scalar> ST;
typedef Thyra::ModelEvaluatorBase MEB;
TEUCHOS_TEST_FOR_EXCEPTION( !isInitialized_, std::logic_error,
"Error! initializeDIRKModel must be called before evalModel\n"
);
TEUCHOS_TEST_FOR_EXCEPTION( !setTimeStepPointCalled_, std::logic_error,
"Error! setTimeStepPoint must be called before evalModel"
);
TEUCHOS_TEST_FOR_EXCEPTION( currentStage_ == -1, std::logic_error,
"Error! setCurrentStage must be called before evalModel"
);
THYRA_MODEL_EVALUATOR_DECORATOR_EVAL_MODEL_GEN_BEGIN(
"Rythmos::DiagonalImplicitRKModelEvaluator",inArgs_stage,outArgs_stage,daeModel_
);
//
// A) Unwrap the inArgs and outArgs
//
const RCP<const Thyra::VectorBase<Scalar> > x_in = inArgs_stage.get_x();
const RCP<Thyra::VectorBase<Scalar> > f_out = outArgs_stage.get_f();
const RCP<Thyra::LinearOpBase<Scalar> > W_op_out = outArgs_stage.get_W_op();
//
// B) Assemble f_out and W_op_out for given stage
//
MEB::InArgs<Scalar> daeInArgs = daeModel_->createInArgs();
MEB::OutArgs<Scalar> daeOutArgs = daeModel_->createOutArgs();
const RCP<Thyra::VectorBase<Scalar> > x_i = createMember(daeModel_->get_x_space());
daeInArgs.setArgs(basePoint_);
// B.1) Setup the DAE's inArgs for stage f(currentStage_) ...
V_V(stage_derivatives_->getNonconstVectorBlock(currentStage_).ptr(),*x_in);
assembleIRKState( currentStage_, dirkButcherTableau_->A(), delta_t_, *x_old_, *stage_derivatives_, outArg(*x_i) );
daeInArgs.set_x( x_i );
daeInArgs.set_x_dot( x_in );
daeInArgs.set_t( t_old_ + dirkButcherTableau_->c()(currentStage_) * delta_t_ );
daeInArgs.set_alpha(ST::one());
daeInArgs.set_beta( delta_t_ * dirkButcherTableau_->A()(currentStage_,currentStage_) );
// B.2) Setup the DAE's outArgs for stage f(i) ...
if (!is_null(f_out))
daeOutArgs.set_f( f_out );
if (!is_null(W_op_out))
daeOutArgs.set_W_op(W_op_out);
// B.3) Compute f_out(i) and/or W_op_out ...
daeModel_->evalModel( daeInArgs, daeOutArgs );
daeOutArgs.set_f(Teuchos::null);
daeOutArgs.set_W_op(Teuchos::null);
THYRA_MODEL_EVALUATOR_DECORATOR_EVAL_MODEL_END();
}
void TimeDiscretizedBackwardEulerModelEvaluator<Scalar>::evalModelImpl(
const Thyra::ModelEvaluatorBase::InArgs<Scalar>& inArgs_bar,
const Thyra::ModelEvaluatorBase::OutArgs<Scalar>& outArgs_bar
) const
{
using Teuchos::rcp_dynamic_cast;
typedef ScalarTraits<Scalar> ST;
typedef Thyra::ModelEvaluatorBase MEB;
typedef Thyra::VectorBase<Scalar> VB;
typedef Thyra::ProductVectorBase<Scalar> PVB;
typedef Thyra::BlockedLinearOpBase<Scalar> BLWB;
/*
THYRA_MODEL_EVALUATOR_DECORATOR_EVAL_MODEL_GEN_BEGIN(
"Rythmos::ImplicitRKModelEvaluator",inArgs_bar,outArgs_bar,daeModel_
);
*/
TEST_FOR_EXCEPTION( delta_t_ <= 0.0, std::logic_error,
"Error, you have not initialized this object correctly!" );
//
// A) Unwrap the inArgs and outArgs to get at product vectors and block op
//
const RCP<const PVB> x_bar = rcp_dynamic_cast<const PVB>(inArgs_bar.get_x(), true);
const RCP<PVB> f_bar = rcp_dynamic_cast<PVB>(outArgs_bar.get_f(), true);
RCP<BLWB> W_op_bar = rcp_dynamic_cast<BLWB>(outArgs_bar.get_W_op(), true);
//
// B) Assemble f_bar and W_op_bar by looping over stages
//
MEB::InArgs<Scalar> daeInArgs = daeModel_->createInArgs();
MEB::OutArgs<Scalar> daeOutArgs = daeModel_->createOutArgs();
const RCP<VB> x_dot_i = createMember(daeModel_->get_x_space());
daeInArgs.setArgs(initCond_);
Scalar t_i = initTime_; // ToDo: Define t_init!
const Scalar oneOverDeltaT = 1.0/delta_t_;
for ( int i = 0; i < numTimeSteps_; ++i ) {
// B.1) Setup the DAE's inArgs for time step eqn f(i) ...
const RCP<const Thyra::VectorBase<Scalar> >
x_i = x_bar->getVectorBlock(i),
x_im1 = ( i==0 ? initCond_.get_x() : x_bar->getVectorBlock(i-1) );
V_VmV( x_dot_i.ptr(), *x_i, *x_im1 ); // x_dot_i = 1/dt * ( x[i] - x[i-1] )
Vt_S( x_dot_i.ptr(), oneOverDeltaT ); // ...
daeInArgs.set_x_dot( x_dot_i );
daeInArgs.set_x( x_i );
daeInArgs.set_t( t_i );
daeInArgs.set_alpha( oneOverDeltaT );
daeInArgs.set_beta( 1.0 );
// B.2) Setup the DAE's outArgs for f(i) and/or W(i,i) ...
if (!is_null(f_bar))
daeOutArgs.set_f( f_bar->getNonconstVectorBlock(i) );
if (!is_null(W_op_bar))
daeOutArgs.set_W_op(W_op_bar->getNonconstBlock(i,i).assert_not_null());
// B.3) Compute f_bar(i) and/or W_op_bar(i,i) ...
daeModel_->evalModel( daeInArgs, daeOutArgs );
daeOutArgs.set_f(Teuchos::null);
daeOutArgs.set_W_op(Teuchos::null);
// B.4) Evaluate W_op_bar(i,i-1)
if ( !is_null(W_op_bar) && i > 0 ) {
daeInArgs.set_alpha( -oneOverDeltaT );
daeInArgs.set_beta( 0.0 );
daeOutArgs.set_W_op(W_op_bar->getNonconstBlock(i,i-1).assert_not_null());
daeModel_->evalModel( daeInArgs, daeOutArgs );
daeOutArgs.set_W_op(Teuchos::null);
}
//
t_i += delta_t_;
}
/*
THYRA_MODEL_EVALUATOR_DECORATOR_EVAL_MODEL_END();
*/
}
void ImplicitRKModelEvaluator<Scalar>::evalModelImpl(
const Thyra::ModelEvaluatorBase::InArgs<Scalar>& inArgs_bar,
const Thyra::ModelEvaluatorBase::OutArgs<Scalar>& outArgs_bar
) const
{
using Teuchos::rcp_dynamic_cast;
typedef ScalarTraits<Scalar> ST;
typedef Thyra::ModelEvaluatorBase MEB;
typedef Thyra::VectorBase<Scalar> VB;
typedef Thyra::ProductVectorBase<Scalar> PVB;
typedef Thyra::BlockedLinearOpBase<Scalar> BLWB;
TEST_FOR_EXCEPTION( !isInitialized_, std::logic_error,
"Error! initializeIRKModel must be called before evalModel\n"
);
TEST_FOR_EXCEPTION( !setTimeStepPointCalled_, std::logic_error,
"Error! setTimeStepPoint must be called before evalModel"
);
THYRA_MODEL_EVALUATOR_DECORATOR_EVAL_MODEL_GEN_BEGIN(
"Rythmos::ImplicitRKModelEvaluator",inArgs_bar,outArgs_bar,daeModel_
);
//
// A) Unwrap the inArgs and outArgs to get at product vectors and block op
//
const RCP<const PVB> x_bar = rcp_dynamic_cast<const PVB>(inArgs_bar.get_x(), true);
const RCP<PVB> f_bar = rcp_dynamic_cast<PVB>(outArgs_bar.get_f(), true);
const RCP<BLWB> W_op_bar = rcp_dynamic_cast<BLWB>(outArgs_bar.get_W_op(), true);
//
// B) Assemble f_bar and W_op_bar by looping over stages
//
MEB::InArgs<Scalar> daeInArgs = daeModel_->createInArgs();
MEB::OutArgs<Scalar> daeOutArgs = daeModel_->createOutArgs();
const RCP<VB> x_i = createMember(daeModel_->get_x_space());
daeInArgs.setArgs(basePoint_);
const int numStages = irkButcherTableau_->numStages();
for ( int i = 0; i < numStages; ++i ) {
// B.1) Setup the DAE's inArgs for stage f(i) ...
assembleIRKState( i, irkButcherTableau_->A(), delta_t_, *x_old_, *x_bar, outArg(*x_i) );
daeInArgs.set_x( x_i );
daeInArgs.set_x_dot( x_bar->getVectorBlock(i) );
daeInArgs.set_t( t_old_ + irkButcherTableau_->c()(i) * delta_t_ );
Scalar alpha = ST::zero();
if (i == 0) {
alpha = ST::one();
} else {
alpha = ST::zero();
}
Scalar beta = delta_t_ * irkButcherTableau_->A()(i,0);
daeInArgs.set_alpha( alpha );
daeInArgs.set_beta( beta );
// B.2) Setup the DAE's outArgs for stage f(i) ...
if (!is_null(f_bar))
daeOutArgs.set_f( f_bar->getNonconstVectorBlock(i) );
if (!is_null(W_op_bar)) {
daeOutArgs.set_W_op(W_op_bar->getNonconstBlock(i,0));
}
// B.3) Compute f_bar(i) and/or W_op_bar(i,0) ...
daeModel_->evalModel( daeInArgs, daeOutArgs );
daeOutArgs.set_f(Teuchos::null);
daeOutArgs.set_W_op(Teuchos::null);
// B.4) Evaluate the rest of the W_op_bar(i,j=1...numStages-1) ...
if (!is_null(W_op_bar)) {
for ( int j = 1; j < numStages; ++j ) {
alpha = ST::zero();
if (i == j) {
alpha = ST::one();
} else {
alpha = ST::zero();
}
beta = delta_t_ * irkButcherTableau_->A()(i,j);
daeInArgs.set_alpha( alpha );
daeInArgs.set_beta( beta );
daeOutArgs.set_W_op(W_op_bar->getNonconstBlock(i,j));
daeModel_->evalModel( daeInArgs, daeOutArgs );
daeOutArgs.set_W_op(Teuchos::null);
}
}
}
THYRA_MODEL_EVALUATOR_DECORATOR_EVAL_MODEL_END();
}