GRINS::SpalartAllmarasSPGSMStabilization< Viscosity > Class Template Reference

Adds SUPG stabilization to the SpalartAllmaras 'physics'. More...

#include <spalart_allmaras_spgsm_stab.h>

Inheritance diagram for GRINS::SpalartAllmarasSPGSMStabilization< Viscosity >:

Collaboration diagram for GRINS::SpalartAllmarasSPGSMStabilization< Viscosity >:

Public Member Functions
	SpalartAllmarasSPGSMStabilization (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~SpalartAllmarasSPGSMStabilization ()
virtual void	init_variables (libMesh::FEMSystem *system)
	Initialize variables for this physics. More...
virtual void	element_time_derivative (bool compute_jacobian, AssemblyContext &context)
	Time dependent part(s) of physics for element interiors. More...
virtual void	mass_residual (bool compute_jacobian, AssemblyContext &context)
	Mass matrix part(s) for element interiors. All boundary terms lie within the time_derivative part. More...
virtual void	register_parameter (const std::string &param_name, libMesh::ParameterMultiAccessor< libMesh::Number > &param_pointer) const
	Each subclass will register its copy of an independent. More...
Public Member Functions inherited from GRINS::SpalartAllmarasStabilizationBase< Viscosity >
	SpalartAllmarasStabilizationBase (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~SpalartAllmarasStabilizationBase ()
virtual void	init_context (AssemblyContext &context)
	Initialize context for added physics variables. More...
Public Member Functions inherited from GRINS::SpalartAllmaras< Viscosity >
	SpalartAllmaras (const std::string &physics_name, const GetPot &input)
	~SpalartAllmaras ()
virtual void	set_time_evolving_vars (libMesh::FEMSystem *system)
	Sets velocity variables to be time-evolving. More...
Public Member Functions inherited from GRINS::TurbulenceModelsBase< Viscosity >
	TurbulenceModelsBase (const std::string &physics_name, const GetPot &input)
	~TurbulenceModelsBase ()
Public Member Functions inherited from GRINS::Physics
	Physics (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~Physics ()
virtual bool	enabled_on_elem (const libMesh::Elem *elem)
	Find if current physics is active on supplied element. More...
void	set_is_steady (bool is_steady)
	Sets whether this physics is to be solved with a steady solver or not. More...
bool	is_steady () const
	Returns whether or not this physics is being solved with a steady solver. More...
virtual void	auxiliary_init (MultiphysicsSystem &system)
	Any auxillary initialization a Physics class may need. More...
virtual void	register_postprocessing_vars (const GetPot &input, PostProcessedQuantities< libMesh::Real > &postprocessing)
	Register name of postprocessed quantity with PostProcessedQuantities. More...
virtual void	preassembly (MultiphysicsSystem &)
	Perform any necessary setup before element assembly begins. More...
virtual void	reinit (MultiphysicsSystem &)
	Any reinitialization that needs to be done. More...
virtual void	side_time_derivative (bool, AssemblyContext &)
	Time dependent part(s) of physics for boundaries of elements on the domain boundary. More...
virtual void	nonlocal_time_derivative (bool, AssemblyContext &)
	Time dependent part(s) of physics for scalar variables. More...
virtual void	element_constraint (bool, AssemblyContext &)
	Constraint part(s) of physics for element interiors. More...
virtual void	side_constraint (bool, AssemblyContext &)
	Constraint part(s) of physics for boundaries of elements on the domain boundary. More...
virtual void	nonlocal_constraint (bool, AssemblyContext &)
	Constraint part(s) of physics for scalar variables. More...
virtual void	damping_residual (bool, AssemblyContext &)
	Damping matrix part(s) for element interiors. All boundary terms lie within the time_derivative part. More...
virtual void	nonlocal_mass_residual (bool, AssemblyContext &)
	Mass matrix part(s) for scalar variables. More...
void	init_ics (libMesh::FEMSystem *system, libMesh::CompositeFunction< libMesh::Number > &all_ics)
virtual void	compute_element_time_derivative_cache (AssemblyContext &)
virtual void	compute_side_time_derivative_cache (AssemblyContext &)
virtual void	compute_nonlocal_time_derivative_cache (AssemblyContext &)
virtual void	compute_element_constraint_cache (AssemblyContext &)
virtual void	compute_side_constraint_cache (AssemblyContext &)
virtual void	compute_nonlocal_constraint_cache (AssemblyContext &)
virtual void	compute_damping_residual_cache (AssemblyContext &)
virtual void	compute_mass_residual_cache (AssemblyContext &)
virtual void	compute_nonlocal_mass_residual_cache (AssemblyContext &)
virtual void	compute_postprocessed_quantity (unsigned int quantity_index, const AssemblyContext &context, const libMesh::Point &point, libMesh::Real &value)
ICHandlingBase *	get_ic_handler ()
Public Member Functions inherited from GRINS::ParameterUser
	ParameterUser (const std::string &user_name)
virtual	~ParameterUser ()
virtual void	set_parameter (libMesh::Number &param_variable, const GetPot &input, const std::string &param_name, libMesh::Number param_default)
	Each subclass can simultaneously read a parameter value from. More...
virtual void	set_parameter (libMesh::ParsedFunction< libMesh::Number, libMesh::Gradient > &func, const GetPot &input, const std::string &func_param_name, const std::string &param_default)
	Each subclass can simultaneously read a parsed function from. More...
virtual void	set_parameter (libMesh::ParsedFEMFunction< libMesh::Number > &func, const GetPot &input, const std::string &func_param_name, const std::string &param_default)
	Each subclass can simultaneously read a parsed function from. More...
virtual void	move_parameter (const libMesh::Number &old_parameter, libMesh::Number &new_parameter)
	When cloning an object, we need to update parameter pointers. More...
virtual void	move_parameter (const libMesh::ParsedFunction< libMesh::Number, libMesh::Gradient > &old_func, libMesh::ParsedFunction< libMesh::Number, libMesh::Gradient > &new_func)
	When cloning an object, we need to update parameter pointers. More...
virtual void	move_parameter (const libMesh::ParsedFEMFunction< libMesh::Number > &old_func, libMesh::ParsedFEMFunction< libMesh::Number > &new_func)
	When cloning an object, we need to update parameter pointers. More...

Private Member Functions
	SpalartAllmarasSPGSMStabilization ()

Additional Inherited Members
Static Public Member Functions inherited from GRINS::Physics
static void	set_is_axisymmetric (bool is_axisymmetric)
	Set whether we should treat the problem as axisymmetric. More...
static bool	is_axisymmetric ()
Public Attributes inherited from GRINS::SpalartAllmaras< Viscosity >
libMesh::UniquePtr< DistanceFunction >	distance_function
libMesh::UniquePtr< libMesh::SerialMesh >	boundary_mesh
Static Public Attributes inherited from GRINS::ParameterUser
static std::string	zero_vector_function = std::string("{0}")
	A parseable function string with LIBMESH_DIM components, all 0. More...
Protected Member Functions inherited from GRINS::Physics
libMesh::UniquePtr< libMesh::FEGenericBase< libMesh::Real > >	build_new_fe (const libMesh::Elem *elem, const libMesh::FEGenericBase< libMesh::Real > *fe, const libMesh::Point p)
void	parse_enabled_subdomains (const GetPot &input, const std::string &physics_name)
void	check_var_subdomain_consistency (const FEVariablesBase &var) const
	Check that var is enabled on at least the subdomains this Physics is. More...
Protected Attributes inherited from GRINS::SpalartAllmarasStabilizationBase< Viscosity >
SpalartAllmarasStabilizationHelper	_stab_helper
Protected Attributes inherited from GRINS::SpalartAllmaras< Viscosity >
VelocityVariable &	_flow_vars
PressureFEVariable &	_press_var
TurbulenceFEVariables &	_turbulence_vars
SpalartAllmarasHelper	_spalart_allmaras_helper
SpalartAllmarasParameters	_sa_params
	Object handling the plethora of parameters. More...
std::set< libMesh::boundary_id_type >	_wall_ids
unsigned int	_no_of_walls
bool	_infinite_distance
Protected Attributes inherited from GRINS::TurbulenceModelsBase< Viscosity >
unsigned int	_dim
	Physical dimension of problem. More...
libMesh::Number	_rho
	Material parameters, read from input. More...
Viscosity	_mu
	Viscosity object. More...
Protected Attributes inherited from GRINS::Physics
const PhysicsName	_physics_name
	Name of the physics object. Used for reading physics specific inputs. More...
GRINS::ICHandlingBase *	_ic_handler
std::set< libMesh::subdomain_id_type >	_enabled_subdomains
	Subdomains on which the current Physics class is enabled. More...
Static Protected Attributes inherited from GRINS::Physics
static bool	_is_steady = false
	Caches whether or not the solver that's being used is steady or not. More...
static bool	_is_axisymmetric = false
	Caches whether we are solving an axisymmetric problem or not. More...

Detailed Description

template<class Viscosity>
class GRINS::SpalartAllmarasSPGSMStabilization< Viscosity >

Adds SUPG stabilization to the SpalartAllmaras 'physics'.

Definition at line 36 of file spalart_allmaras_spgsm_stab.h.

Constructor & Destructor Documentation

template<class Mu >

GRINS::SpalartAllmarasSPGSMStabilization< Mu >::SpalartAllmarasSPGSMStabilization	(	const GRINS::PhysicsName &	physics_name,
		const GetPot &	input
	)

Definition at line 42 of file spalart_allmaras_spgsm_stab.C.

    : SpalartAllmarasStabilizationBase<Mu>(physics_name,input)
  {}

template<class Viscosity >

virtual GRINS::SpalartAllmarasSPGSMStabilization< Viscosity >::~SpalartAllmarasSPGSMStabilization ( )

inlinevirtual

Definition at line 42 of file spalart_allmaras_spgsm_stab.h.

{};

template<class Viscosity >

GRINS::SpalartAllmarasSPGSMStabilization< Viscosity >::SpalartAllmarasSPGSMStabilization ( )

private

Member Function Documentation

template<class Mu >

void GRINS::SpalartAllmarasSPGSMStabilization< Mu >::element_time_derivative ( bool  , AssemblyContext &    )

virtual

Time dependent part(s) of physics for element interiors.

Reimplemented from GRINS::SpalartAllmaras< Viscosity >.

Definition at line 67 of file spalart_allmaras_spgsm_stab.C.

  {
    // Get a pointer to the current element, we need this for computing the distance to wall for the
    // quadrature points
    libMesh::Elem &elem_pointer = context.get_elem();

    // The number of local degrees of freedom in each variable.
    const unsigned int n_nu_dofs = context.get_dof_indices(this->_turbulence_vars.nu()).size();

    // Element Jacobian * quadrature weights for interior integration.
    const std::vector<libMesh::Real> &JxW =
      context.get_element_fe(this->_turbulence_vars.nu())->get_JxW();

    // The viscosity shape function gradients (in global coords.)
    // at interior quadrature points.
    const std::vector<std::vector<libMesh::RealGradient> >& nu_gradphi =
      context.get_element_fe(this->_turbulence_vars.nu())->get_dphi();

    // Quadrature point locations
    //const std::vector<libMesh::Point>& nu_qpoint =
    //context.get_element_fe(this->_turbulence_vars.nu())->get_xyz();

    //libMesh::DenseSubMatrix<libMesh::Number> &Knunu = context.get_elem_jacobian(this->_turbulence_vars.nu(), this->_turbulence_vars.nu()); // R_{nu},{nu}

    libMesh::DenseSubVector<libMesh::Number> &Fnu = context.get_elem_residual(this->_turbulence_vars.nu()); // R_{nu}

    libMesh::FEBase* fe = context.get_element_fe(this->_turbulence_vars.nu());

    unsigned int n_qpoints = context.get_element_qrule().n_points();

    // Auto pointer to distance fcn evaluated at quad points
    libMesh::UniquePtr< libMesh::DenseVector<libMesh::Real> > distance_qp;

    // Fill the vector of distances to quadrature points
    distance_qp = this->distance_function->interpolate(&elem_pointer, context.get_element_qrule().get_points());

    for (unsigned int qp=0; qp != n_qpoints; qp++)
      {
        libMesh::Gradient grad_nu;
        grad_nu = context.interior_gradient(this->_turbulence_vars.nu(), qp);

        libMesh::Real jac = JxW[qp];

        // The physical viscosity
        libMesh::Real _mu_qp = this->_mu(context, qp);

        // To be fixed
        // For the channel flow we will just set the distance function analytically
        //(*distance_qp)(qp) = std::min(fabs(y),fabs(1 - y));

        // The flow velocity
        libMesh::Number u,v;
        u = context.interior_value(this->_flow_vars.u(), qp);
        v = context.interior_value(this->_flow_vars.v(), qp);

        libMesh::NumberVectorValue U(u,v);
        if (this->_flow_vars.dim() == 3)
          U(2) = context.interior_value(this->_flow_vars.w(), qp);

        // Stabilization terms

        libMesh::RealGradient g = this->_stab_helper.compute_g( fe, context, qp );
        libMesh::RealTensor G = this->_stab_helper.compute_G( fe, context, qp );

        libMesh::Real tau_spalart = this->_stab_helper.compute_tau_spalart( context, qp, g, G, this->_rho, U, _mu_qp, this->_is_steady );

        libMesh::Number RM_spalart = this->_stab_helper.compute_res_spalart_steady( context, qp, this->_rho, _mu_qp, (*distance_qp)(qp), this->_infinite_distance );

        for (unsigned int i=0; i != n_nu_dofs; i++)
          {
            Fnu(i) += jac*( -tau_spalart*RM_spalart*this->_rho*(U*nu_gradphi[i][qp]) );
          }

        if( compute_jacobian )
          {
            libmesh_not_implemented();
          }

      }
  }

template<class Mu >

void GRINS::SpalartAllmarasSPGSMStabilization< Mu >::init_variables ( libMesh::FEMSystem *  )

virtual

Initialize variables for this physics.

Reimplemented from GRINS::SpalartAllmaras< Viscosity >.

Definition at line 48 of file spalart_allmaras_spgsm_stab.C.

References GRINS::SpalartAllmaras< Viscosity >::init_variables().

  {
    // Init base class variables for stab_helper and distance function initialization
    SpalartAllmarasStabilizationBase<Mu>::init_variables(system);

    return;
  }

template<class Mu >

void GRINS::SpalartAllmarasSPGSMStabilization< Mu >::mass_residual ( bool  , AssemblyContext &    )

virtual

Mass matrix part(s) for element interiors. All boundary terms lie within the time_derivative part.

Reimplemented from GRINS::SpalartAllmaras< Viscosity >.

Definition at line 151 of file spalart_allmaras_spgsm_stab.C.

  {
    // Get a pointer to the current element, we need this for computing the distance to wall for the
    // quadrature points
    libMesh::Elem &elem_pointer = context.get_elem();

    // The number of local degrees of freedom in each variable.
    const unsigned int n_nu_dofs = context.get_dof_indices(this->_turbulence_vars.nu()).size();

    // Element Jacobian * quadrature weights for interior integration.
    const std::vector<libMesh::Real> &JxW =
      context.get_element_fe(this->_turbulence_vars.nu())->get_JxW();

    // The pressure shape functions at interior quadrature points.
    const std::vector<std::vector<libMesh::RealGradient> >& nu_gradphi =
      context.get_element_fe(this->_turbulence_vars.nu())->get_dphi();

    libMesh::DenseSubVector<libMesh::Number> &Fnu = context.get_elem_residual(this->_turbulence_vars.nu()); // R_{nu}

    libMesh::FEBase* fe = context.get_element_fe(this->_turbulence_vars.nu());

    unsigned int n_qpoints = context.get_element_qrule().n_points();

    // Auto pointer to distance fcn evaluated at quad points
    libMesh::UniquePtr< libMesh::DenseVector<libMesh::Real> > distance_qp;

    // Fill the vector of distances to quadrature points
    distance_qp = this->distance_function->interpolate(&elem_pointer, context.get_element_qrule().get_points());

    for (unsigned int qp=0; qp != n_qpoints; qp++)
      {
        libMesh::RealGradient g = this->_stab_helper.compute_g( fe, context, qp );
        libMesh::RealTensor G = this->_stab_helper.compute_G( fe, context, qp );

        libMesh::RealGradient U( context.fixed_interior_value( this->_flow_vars.u(), qp ),
                                 context.fixed_interior_value( this->_flow_vars.v(), qp ) );
        // Compute the viscosity at this qp
        libMesh::Real _mu_qp = this->_mu(context, qp);

        if( this->_flow_vars.dim() == 3 )
          {
            U(2) = context.fixed_interior_value( this->_flow_vars.w(), qp );
          }

        libMesh::Real tau_spalart = this->_stab_helper.compute_tau_spalart( context, qp, g, G, this->_rho, U, _mu_qp, this->_is_steady );

        libMesh::Real RM_spalart = this->_stab_helper.compute_res_spalart_transient( context, qp, this->_rho );

        for (unsigned int i=0; i != n_nu_dofs; i++)
          {
            Fnu(i) += -JxW[qp]*tau_spalart*RM_spalart*this->_rho*(U*nu_gradphi[i][qp]);
          }

        if( compute_jacobian )
          {
            libmesh_not_implemented();
          }

      }
  }

template<class Mu >

void GRINS::SpalartAllmarasSPGSMStabilization< Mu >::register_parameter ( const std::string &  param_name, libMesh::ParameterMultiAccessor< libMesh::Number > &  param_pointer  ) const

virtual

Each subclass will register its copy of an independent.

Reimplemented from GRINS::SpalartAllmarasStabilizationBase< Viscosity >.

Definition at line 58 of file spalart_allmaras_spgsm_stab.C.

References GRINS::SpalartAllmarasStabilizationBase< Viscosity >::register_parameter().

  {
    // Register base class parameters
    SpalartAllmarasStabilizationBase<Mu>::register_parameter(param_name, param_pointer);
  }

---

The documentation for this class was generated from the following files:

• src/physics/include/grins/spalart_allmaras_spgsm_stab.h
• src/physics/src/spalart_allmaras_spgsm_stab.C