reacting_low_mach_navier_stokes_base.C

Go to the documentation of this file.

//-----------------------------------------------------------------------bl-
//--------------------------------------------------------------------------
//
// GRINS - General Reacting Incompressible Navier-Stokes
//
// Copyright (C) 2014-2015 Paul T. Bauman, Roy H. Stogner
// Copyright (C) 2010-2013 The PECOS Development Team
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the Version 2.1 GNU Lesser General
// Public License as published by the Free Software Foundation.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc. 51 Franklin Street, Fifth Floor,
// Boston, MA  02110-1301  USA
//
//-----------------------------------------------------------------------el-


#include "grins_config.h"

// This class
#include "grins/reacting_low_mach_navier_stokes_base.h"

// GRINS
#include "grins/assembly_context.h"
#include "grins/cached_quantities_enum.h"
#include "grins/cantera_mixture.h"
#include "grins/grins_enums.h"
#include "grins/antioch_mixture.h"

// libMesh
#include "libmesh/string_to_enum.h"
#include "libmesh/quadrature.h"
#include "libmesh/fem_system.h"

namespace GRINS
{
  template<typename Mixture, typename Evaluator>
  ReactingLowMachNavierStokesBase<Mixture,Evaluator>::ReactingLowMachNavierStokesBase(const std::string& physics_name,
                                                                            const GetPot& input)
    : Physics(physics_name, input),
      _gas_mixture(input),
      _fixed_density( input("Physics/"+reacting_low_mach_navier_stokes+"/fixed_density", false ) ),
      _fixed_rho_value(0.0)
  {
    this->set_parameter
      (_fixed_rho_value, input,
       "Physics/"+reacting_low_mach_navier_stokes+"/fixed_rho_value", 0.0 );

    this->read_input_options(input);
    
    return;
  }

  template<typename Mixture, typename Evaluator>
  ReactingLowMachNavierStokesBase<Mixture,Evaluator>::~ReactingLowMachNavierStokesBase()
  {
    return;
  }

  template<typename Mixture, typename Evaluator>
  void ReactingLowMachNavierStokesBase<Mixture,Evaluator>::read_input_options( const GetPot& input )
  {
    // Read FE family info
    this->_species_FE_family = libMesh::Utility::string_to_enum<GRINSEnums::FEFamily>( input("Physics/"+reacting_low_mach_navier_stokes+"/species_FE_family", "LAGRANGE") );

    this->_V_FE_family = libMesh::Utility::string_to_enum<GRINSEnums::FEFamily>( input("Physics/"+reacting_low_mach_navier_stokes+"/V_FE_family", "LAGRANGE") );

    this->_P_FE_family = libMesh::Utility::string_to_enum<GRINSEnums::FEFamily>( input("Physics/"+reacting_low_mach_navier_stokes+"/P_FE_family", "LAGRANGE") );

    this->_T_FE_family = libMesh::Utility::string_to_enum<GRINSEnums::FEFamily>( input("Physics/"+reacting_low_mach_navier_stokes+"/T_FE_family", "LAGRANGE") );

    // Read FE family info
    this->_species_order = libMesh::Utility::string_to_enum<GRINSEnums::Order>( input("Physics/"+reacting_low_mach_navier_stokes+"/species_order", "SECOND") );

    this->_V_order = libMesh::Utility::string_to_enum<GRINSEnums::Order>( input("Physics/"+reacting_low_mach_navier_stokes+"/V_order", "SECOND") );

    this->_P_order = libMesh::Utility::string_to_enum<GRINSEnums::Order>( input("Physics/"+reacting_low_mach_navier_stokes+"/P_order", "FIRST") );

    this->_T_order = libMesh::Utility::string_to_enum<GRINSEnums::Order>( input("Physics/"+reacting_low_mach_navier_stokes+"/T_order", "SECOND") );

    // Read variable naming info
    this->_n_species = input.vector_variable_size("Physics/Chemistry/species");

    _species_var_names.reserve(this->_n_species);
    for( unsigned int i = 0; i < this->_n_species; i++ )
      {
        std::string var_name = "w_"+std::string(input( "Physics/Chemistry/species", "DIE!", i ));
        _species_var_names.push_back( var_name );
      }

    this->_u_var_name = input("Physics/VariableNames/u_velocity", GRINS::u_var_name_default );
    this->_v_var_name = input("Physics/VariableNames/v_velocity", GRINS::v_var_name_default );
    this->_w_var_name = input("Physics/VariableNames/w_velocity", GRINS::w_var_name_default );
    this->_p_var_name = input("Physics/VariableNames/pressure", GRINS::p_var_name_default );
    this->_T_var_name = input("Physics/VariableNames/temperature", GRINS::T_var_name_default );

    // Read thermodynamic state info
    this->set_parameter
      (_p0, input, "Physics/"+reacting_low_mach_navier_stokes+"/p0", 0.0 ); /* thermodynamic pressure */

    _enable_thermo_press_calc = input("Physics/"+reacting_low_mach_navier_stokes+"/enable_thermo_press_calc", false );

    if( _enable_thermo_press_calc )
      {
        _p0_var_name = input("Physics/VariableNames/thermo_presure", "p0" );
      }

    // Read gravity vector
    unsigned int g_dim = input.vector_variable_size("Physics/"+reacting_low_mach_navier_stokes+"/g");

    _g(0) = input("Physics/"+reacting_low_mach_navier_stokes+"/g", 0.0, 0 );
    _g(1) = input("Physics/"+reacting_low_mach_navier_stokes+"/g", 0.0, 1 );
  
    if( g_dim == 3)
      _g(2) = input("Physics/"+reacting_low_mach_navier_stokes+"/g", 0.0, 2 );
  
    return;
  }

  template<typename Mixture, typename Evaluator>
  void ReactingLowMachNavierStokesBase<Mixture,Evaluator>::init_variables( libMesh::FEMSystem* system )
  {
    // Get libMesh to assign an index for each variable
    this->_dim = system->get_mesh().mesh_dimension();
    
    _species_vars.reserve(this->_n_species);
    for( unsigned int i = 0; i < this->_n_species; i++ )
      {
        _species_vars.push_back( system->add_variable( _species_var_names[i], 
                                                       this->_species_order, _species_FE_family) );
      }

    _u_var = system->add_variable( _u_var_name, this->_V_order, _V_FE_family);
    _v_var = system->add_variable( _v_var_name, this->_V_order, _V_FE_family);

    if (_dim == 3)
      _w_var = system->add_variable( _w_var_name, this->_V_order, _V_FE_family);
    else
      _w_var = _u_var;

    _p_var = system->add_variable( _p_var_name, this->_P_order, _P_FE_family);
    _T_var = system->add_variable( _T_var_name, this->_T_order, _T_FE_family);

    /* If we need to compute the thermodynamic pressure, we force this to be a first
       order scalar variable. */
    if( _enable_thermo_press_calc )
      _p0_var = system->add_variable( _p0_var_name, libMesh::FIRST, libMesh::SCALAR);

    return;
  }

  template<typename Mixture, typename Evaluator>
  void ReactingLowMachNavierStokesBase<Mixture,Evaluator>::set_time_evolving_vars( libMesh::FEMSystem* system )
  {
    const unsigned int dim = system->get_mesh().mesh_dimension();

    for( unsigned int i = 0; i < this->_n_species; i++ )
      {
        system->time_evolving( _species_vars[i] );
      }

    system->time_evolving(_u_var);
    system->time_evolving(_v_var);

    if (dim == 3)
      system->time_evolving(_w_var);

    system->time_evolving(_T_var);
    system->time_evolving(_p_var);

    if( _enable_thermo_press_calc )
      system->time_evolving(_p0_var);

    return;
  }

  template<typename Mixture, typename Evaluator>
  void ReactingLowMachNavierStokesBase<Mixture,Evaluator>::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(_species_vars[0])->get_JxW();
    context.get_element_fe(_species_vars[0])->get_phi();
    context.get_element_fe(_species_vars[0])->get_dphi();
    context.get_element_fe(_species_vars[0])->get_xyz();

    context.get_element_fe(_u_var)->get_JxW();
    context.get_element_fe(_u_var)->get_phi();
    context.get_element_fe(_u_var)->get_dphi();
    context.get_element_fe(_u_var)->get_xyz();

    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_element_fe(_p_var)->get_phi();
    context.get_element_fe(_p_var)->get_xyz();

    return;
  }

} // end namespace GRINS