VertexCFD_BoundaryState_VariableFixed_impl.hpp

#ifndef VERTEXCFD_BOUNDARYSTATE_VARIABLEFIXED_IMPL_HPP
#define VERTEXCFD_BOUNDARYSTATE_VARIABLEFIXED_IMPL_HPP
 
#include <Panzer_HierarchicParallelism.hpp>
 
namespace VertexCFD
{
namespace BoundaryCondition
{
//---------------------------------------------------------------------------//
// This function should be used for fixed boundary conditions.
//---------------------------------------------------------------------------//
template<class EvalType, class Traits>
VariableFixed<EvalType, Traits>::VariableFixed(
    const panzer::IntegrationRule& ir,
    const Teuchos::ParameterList& bc_params,
    const std::string variable_name)
    : _boundary_variable("BOUNDARY_" + variable_name, ir.dl_scalar)
    , _boundary_grad_variable("BOUNDARY_GRAD_" + variable_name, ir.dl_vector)
    , _grad_variable("GRAD_" + variable_name, ir.dl_vector)
    , _fixed_value(bc_params.get<double>(variable_name + " Value"))
    , _num_grad_dim(ir.spatial_dimension)
{
    // Compute the coefficients for the linear ramping in time f(x) = a * time
    // + b
    _time_init = bc_params.isType<double>("Time Initial")
                     ? bc_params.get<double>("Time Initial")
                     : 0.0;
    _time_final = bc_params.isType<double>("Time Final")
                      ? bc_params.get<double>("Time Final")
                      : 1.0E-06;
 
    const auto variable_init = bc_params.isType<double>(
                                           variable_name + " Value "
                                           "Initial")
                                           ? bc_params.get<double>(
                                                 variable_name + " Value "
                                                 "Initial")
                                           : _fixed_value;
    const double dt = _time_final - _time_init;
    _a = (_fixed_value - variable_init) / dt;
    _b = variable_init - _a * _time_init;
 
    // Add evaluated fields
    this->addEvaluatedField(_boundary_variable);
    this->addEvaluatedField(_boundary_grad_variable);
 
    // Add dependent fields
    this->addDependentField(_grad_variable);
 
    this->setName(variable_name + " Boundary State Variable Fixed "
                  + std::to_string(_num_grad_dim) + "D");
}
 
//---------------------------------------------------------------------------//
template<class EvalType, class Traits>
void VariableFixed<EvalType, Traits>::evaluateFields(
    typename Traits::EvalData workset)
{
    // Update time and make sure that 'time' only varies between '_time_init'
    // and '_time_final'
    const double time = workset.time < _time_init     ? _time_init
                        : workset.time >= _time_final ? _time_final
                                                      : workset.time;
    _variable_value = _a * time + _b;
 
    auto policy = panzer::HP::inst().teamPolicy<scalar_type, PHX::Device>(
        workset.num_cells);
    Kokkos::parallel_for(this->getName(), policy, *this);
}
 
//---------------------------------------------------------------------------//
template<class EvalType, class Traits>
KOKKOS_INLINE_FUNCTION void VariableFixed<EvalType, Traits>::operator()(
    const Kokkos::TeamPolicy<PHX::exec_space>::member_type& team) const
{
    const int cell = team.league_rank();
    const int num_point = _grad_variable.extent(1);
 
    Kokkos::parallel_for(Kokkos::TeamThreadRange(team, 0, num_point),
                         [&](const int point) {
                             // Assign boundary values
                             _boundary_variable(cell, point) = _variable_value;
 
                             // Assign gradient.
                             for (int d = 0; d < _num_grad_dim; ++d)
                             {
                                 _boundary_grad_variable(cell, point, d)
                                     = _grad_variable(cell, point, d);
                             }
                         });
}
 
//---------------------------------------------------------------------------//
 
} // end namespace BoundaryCondition
} // end namespace VertexCFD
 
#endif // end VERTEXCFD_BOUNDARYSTATE_VARIABLEFIXED_IMPL_HPP