inc_navier_stokes_bc_handling.C

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//-----------------------------------------------------------------------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-


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

// GRINS
#include "grins/parabolic_profile.h"

// libMesh
#include "libmesh/zero_function.h"
#include "libmesh/dirichlet_boundaries.h"
#include "libmesh/dof_map.h"
#include "libmesh/fem_system.h"

namespace GRINS
{

  IncompressibleNavierStokesBCHandling::IncompressibleNavierStokesBCHandling(const std::string& physics_name,
                                                                             const GetPot& input)
    : BCHandlingBase(physics_name),
      _flow_vars(input)
  {
    std::string id_str = "Physics/"+_physics_name+"/bc_ids";
    std::string bc_str = "Physics/"+_physics_name+"/bc_types";
    std::string var_str = "Physics/"+_physics_name+"/bc_variables";
    std::string val_str = "Physics/"+_physics_name+"/bc_values";

    this->read_bc_data( input, id_str, bc_str, var_str, val_str );

    return;
  }

  IncompressibleNavierStokesBCHandling::~IncompressibleNavierStokesBCHandling()
  {
    return;
  }

  int IncompressibleNavierStokesBCHandling::string_to_int( const std::string& bc_type ) const
  {
    int bc_type_out;

    if( bc_type == "no_slip" )
      bc_type_out = NO_SLIP;

    else if( bc_type == "prescribed_vel" )
      bc_type_out = PRESCRIBED_VELOCITY;

    else if( bc_type == "parabolic_profile" )
      bc_type_out = PARABOLIC_PROFILE;

    else if( bc_type == "general_velocity" )
      bc_type_out = GENERAL_VELOCITY;

    else
      {
        // Call base class to detect any physics-common boundary conditions
        bc_type_out = BCHandlingBase::string_to_int( bc_type );
      }

    return bc_type_out;
  }

  void IncompressibleNavierStokesBCHandling::init_bc_data( const libMesh::FEMSystem& system )
  {
    _flow_vars.init(const_cast<libMesh::FEMSystem*>(&system));

    return;
  }

  void IncompressibleNavierStokesBCHandling::init_bc_types( const BoundaryID bc_id, 
                                                            const std::string& bc_id_string, 
                                                            const int bc_type, 
                                                            const std::string& bc_vars, 
                                                            const std::string& bc_value, 
                                                            const GetPot& input )
  {
    switch(bc_type)
      {
      case(NO_SLIP):
        {
          this->set_dirichlet_bc_type( bc_id, bc_type );
        }
        break;
      case(PRESCRIBED_VELOCITY):
        {
          this->set_dirichlet_bc_type( bc_id, bc_type );
        
          /* Force the user to specify 3 velocity components regardless of dimension.
             This should make it easier to keep things correct if we want to have 
             2D flow not be in the x-y plane. */
          int n_vel_comps = input.vector_variable_size("Physics/"+_physics_name+"/bound_vel_"+bc_id_string);
          if( n_vel_comps != 3 )
            {
              std::cerr << "Error: Must specify 3 velocity components when inputting"
                        << std::endl
                        << "       prescribed velocities. Found " << n_vel_comps
                        << " velocity components."
                        << std::endl;
              libmesh_error();
            }
        
          this->set_dirichlet_bc_value( bc_id, 
                                        input("Physics/"+_physics_name+"/bound_vel_"+bc_id_string, 0.0, 0 ),
                                        0 );

          this->set_dirichlet_bc_value( bc_id, 
                                        input("Physics/"+_physics_name+"/bound_vel_"+bc_id_string, 0.0, 1 ),
                                        1 );

#if LIBMESH_DIM > 2
          this->set_dirichlet_bc_value( bc_id, 
                                        input("Physics/"+_physics_name+"/bound_vel_"+bc_id_string, 0.0, 2 ),
                                        2 );
#endif
        }
        break;
      case(PARABOLIC_PROFILE):
        {
          this->set_dirichlet_bc_type( bc_id, bc_type );
        
          // Make sure all 6 components are there
          if( input.vector_variable_size("Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string) != 6 )
            {
              std::cerr << "Error: Must specify 6 components when inputting"
                        << std::endl
                        << "       coefficients for a parabolic profile. Found " 
                        << input.vector_variable_size("Physics/"+_physics_name+"/parabolic_profile_"+bc_id_string)
                        << " components."
                        << std::endl;
              libmesh_error();
            }

          libMesh::Real a = input( "Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string, 0.0, 0 );
          libMesh::Real b = input( "Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string, 0.0, 1 );
          libMesh::Real c = input( "Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string, 0.0, 2 );
          libMesh::Real d = input( "Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string, 0.0, 3 );
          libMesh::Real e = input( "Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string, 0.0, 4 );
          libMesh::Real f = input( "Physics/"+_physics_name+"/parabolic_profile_coeffs_"+bc_id_string, 0.0, 5 );

          std::string var = input( "Physics/"+_physics_name+"/parabolic_profile_var_"+bc_id_string, "DIE!" );
        
          if( var == "DIE!" )
            {
              std::cerr << "Error: Mush specify a variable name to which apply parabolic profile through parabolic_profile_var input option." << std::endl;
              libmesh_error();
            }

          DBCContainer cont;
          cont.add_var_name( var );
          cont.add_bc_id( bc_id );

          std::tr1::shared_ptr<libMesh::FunctionBase<libMesh::Number> > func( new ParabolicProfile(a,b,c,d,e,f) );
          cont.set_func( func );
          this->attach_dirichlet_bound_func( cont );
        
          // Set specified components of Dirichlet data to zero
          std::string fix_var = input( "Physics/"+_physics_name+"/parabolic_profile_fix_"+bc_id_string, "DIE!" );

          if( fix_var == "DIE!" )
            {
              std::cerr << "Error: Mush specify a variable name to fix for parabolic profile through parabolic_profile_fix input option." << std::endl;
              libmesh_error();
            }

          DBCContainer cont_fix;
          cont_fix.add_var_name( fix_var );
          cont_fix.add_bc_id( bc_id );

          std::tr1::shared_ptr<libMesh::FunctionBase<libMesh::Number> >
            func_fix( new libMesh::ZeroFunction<libMesh::Number>() );
          cont_fix.set_func( func_fix );
          this->attach_dirichlet_bound_func( cont_fix );
        }
        break;

      case(GENERAL_VELOCITY):
        {
          this->set_dirichlet_bc_type( bc_id, bc_type );
        }
        break;

      case(AXISYMMETRIC):
        {
          this->set_dirichlet_bc_type( bc_id, bc_type );
        }
        break;

      default:
        {
          // Call base class to detect any physics-common boundary conditions
          BCHandlingBase::init_bc_types( bc_id, bc_id_string, bc_type,
                                         bc_vars, bc_value, input );
        }
      } // End switch(bc_type)
  
    return;
  }

  void IncompressibleNavierStokesBCHandling::user_init_dirichlet_bcs( libMesh::FEMSystem* system,
                                                                      libMesh::DofMap& dof_map,
                                                                      BoundaryID bc_id,
                                                                      BCType bc_type ) const
  {
    int dim = system->get_mesh().mesh_dimension();

    VariableIndex u_var = _flow_vars.u_var();
    VariableIndex v_var = _flow_vars.v_var();
    VariableIndex w_var = -1;
    if( dim == 3 )
      w_var = _flow_vars.w_var();

    switch( bc_type )
      {
      case(NO_SLIP):
        {
          std::set<BoundaryID> dbc_ids;
          dbc_ids.insert(bc_id);
        
          std::vector<VariableIndex> dbc_vars;
          dbc_vars.push_back(u_var);
          dbc_vars.push_back(v_var);
          if(dim == 3)
            dbc_vars.push_back(w_var);
        
          libMesh::ZeroFunction<libMesh::Number> zero;
        
          libMesh::DirichletBoundary no_slip_dbc(dbc_ids, 
                                                 dbc_vars, 
                                                 &zero );
        
          dof_map.add_dirichlet_boundary( no_slip_dbc );
        }
        break;
      case(PRESCRIBED_VELOCITY):
        {
          std::set<BoundaryID> dbc_ids;
          dbc_ids.insert(bc_id);
        
          std::vector<VariableIndex> dbc_vars;
        
          // This is inefficient, but it shouldn't matter because
          // everything gets cached on the libMesh side so it should
          // only affect performance at startup.
          {
            dbc_vars.push_back(u_var);
            libMesh::ConstFunction<libMesh::Number>
              vel_func( this->get_dirichlet_bc_value(bc_id,0) );
          
            libMesh::DirichletBoundary vel_dbc(dbc_ids, 
                                               dbc_vars, 
                                               &vel_func );
          
            dof_map.add_dirichlet_boundary( vel_dbc );
            dbc_vars.clear();
          }
        
          {
            dbc_vars.push_back(v_var);
            libMesh::ConstFunction<libMesh::Number>
              vel_func( this->get_dirichlet_bc_value(bc_id,1) );
          
            libMesh::DirichletBoundary vel_dbc(dbc_ids, 
                                               dbc_vars, 
                                               &vel_func );
          
            dof_map.add_dirichlet_boundary( vel_dbc );
            dbc_vars.clear();
          }
          if( dim == 3 )
            {
              dbc_vars.push_back(w_var);
              libMesh::ConstFunction<libMesh::Number>
                vel_func( this->get_dirichlet_bc_value(bc_id,2) );
            
              libMesh::DirichletBoundary vel_dbc(dbc_ids, 
                                                 dbc_vars, 
                                                 &vel_func );
            
              dof_map.add_dirichlet_boundary( vel_dbc );
            }  
        }
        break;
      case(PARABOLIC_PROFILE):
        // This case is handled init_dirichlet_bc_func_objs
        break;

      case(GENERAL_VELOCITY):
        // This case is handled in the init_dirichlet_bc_func_objs
        break;

      case(AXISYMMETRIC):
        {
          std::set<BoundaryID> dbc_ids;
          dbc_ids.insert(bc_id);
        
          std::vector<VariableIndex> dbc_vars;
          dbc_vars.push_back(u_var);
        
          libMesh::ZeroFunction<libMesh::Number> zero;
        
          libMesh::DirichletBoundary no_slip_dbc( dbc_ids, 
                                                  dbc_vars, 
                                                  &zero );
        
          dof_map.add_dirichlet_boundary( no_slip_dbc );
        }
      break;

      default:
        {
          std::cerr << "Invalid BCType " << bc_type << std::endl;
          libmesh_error();
        }
      
      }// end switch

    return;
  }

} // namespace GRINS