GRINS::IncompressibleNavierStokesSPGSMStabilization< Viscosity > Class Template Reference

Adds VMS-based stabilization to LowMachNavierStokes physics class. More...

#include <inc_navier_stokes_spgsm_stab.h>

Inheritance diagram for GRINS::IncompressibleNavierStokesSPGSMStabilization< Viscosity >:

Collaboration diagram for GRINS::IncompressibleNavierStokesSPGSMStabilization< Viscosity >:

Public Member Functions
	IncompressibleNavierStokesSPGSMStabilization (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~IncompressibleNavierStokesSPGSMStabilization ()
virtual void	element_time_derivative (bool compute_jacobian, AssemblyContext &context)
	Time dependent part(s) of physics for element interiors. More...
virtual void	element_constraint (bool compute_jacobian, AssemblyContext &context)
	Constraint 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...
Public Member Functions inherited from GRINS::IncompressibleNavierStokesStabilizationBase< Viscosity >
	IncompressibleNavierStokesStabilizationBase (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~IncompressibleNavierStokesStabilizationBase ()
virtual void	init_context (AssemblyContext &context)
	Initialize context for added physics variables. More...
Public Member Functions inherited from GRINS::IncompressibleNavierStokesBase< Viscosity >
	IncompressibleNavierStokesBase (const std::string &my_physics_name, const std::string &core_physics_name, const GetPot &input)
	~IncompressibleNavierStokesBase ()
virtual void	set_time_evolving_vars (libMesh::FEMSystem *system)
	Sets velocity variables to be time-evolving. 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...
libMesh::Real	get_viscosity_value (AssemblyContext &context, unsigned int qp) const
Public Member Functions inherited from GRINS::Physics
	Physics (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~Physics ()
virtual void	init_variables (libMesh::FEMSystem *)
	Initialize variables for this physics. More...
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	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
	IncompressibleNavierStokesSPGSMStabilization ()

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 ()
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::IncompressibleNavierStokesStabilizationBase< Viscosity >
IncompressibleNavierStokesStabilizationHelper	_stab_helper
Protected Attributes inherited from GRINS::IncompressibleNavierStokesBase< Viscosity >
VelocityVariable &	_flow_vars
PressureFEVariable &	_press_var
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::IncompressibleNavierStokesSPGSMStabilization< Viscosity >

Adds VMS-based stabilization to LowMachNavierStokes physics class.

Definition at line 35 of file inc_navier_stokes_spgsm_stab.h.

Constructor & Destructor Documentation

template<class Mu >

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

Definition at line 39 of file inc_navier_stokes_spgsm_stab.C.

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

template<class Viscosity >

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

inlinevirtual

Definition at line 41 of file inc_navier_stokes_spgsm_stab.h.

{};

template<class Viscosity >

GRINS::IncompressibleNavierStokesSPGSMStabilization< Viscosity >::IncompressibleNavierStokesSPGSMStabilization ( )

private

Member Function Documentation

template<class Mu >

void GRINS::IncompressibleNavierStokesSPGSMStabilization< Mu >::element_constraint ( bool  , AssemblyContext &    )

virtual

Constraint part(s) of physics for element interiors.

Reimplemented from GRINS::Physics.

Definition at line 120 of file inc_navier_stokes_spgsm_stab.C.

  {
    // The number of local degrees of freedom in each variable.
    const unsigned int n_p_dofs = context.get_dof_indices(this->_press_var.p()).size();

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

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

    libMesh::DenseSubVector<libMesh::Number> &Fp = context.get_elem_residual(this->_press_var.p()); // R_{p}

    libMesh::FEBase* fe = context.get_element_fe(this->_flow_vars.u());

    unsigned int n_qpoints = context.get_element_qrule().n_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.interior_value( this->_flow_vars.u(), qp ),
                                 context.interior_value( this->_flow_vars.v(), qp ) );
        if( this->_flow_vars.dim() == 3 )
          U(2) = context.interior_value( this->_flow_vars.w(), qp );

        // Compute the viscosity at this qp
        libMesh::Real _mu_qp = this->_mu(context, qp);

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

        libMesh::RealGradient RM_s = this->_stab_helper.compute_res_momentum_steady( context, qp, this->_rho, _mu_qp );

        for (unsigned int i=0; i != n_p_dofs; i++)
          Fp(i) += tau_M*RM_s*p_dphi[i][qp]*JxW[qp];

        if( compute_jacobian )
          libmesh_not_implemented();
      }
  }

template<class Mu >

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

virtual

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

Reimplemented from GRINS::Physics.

Definition at line 46 of file inc_navier_stokes_spgsm_stab.C.

  {
    // The number of local degrees of freedom in each variable.
    const unsigned int n_u_dofs = context.get_dof_indices(this->_flow_vars.u()).size();

    // Check number of dofs is same for _flow_vars.u(), v_var and w_var.
    libmesh_assert (n_u_dofs == context.get_dof_indices(this->_flow_vars.v()).size());


    if (this->_flow_vars.dim() == 3)
      libmesh_assert (n_u_dofs == context.get_dof_indices(this->_flow_vars.w()).size());

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

    // The velocity shape function gradients at interior quadrature points.
    const std::vector<std::vector<libMesh::RealGradient> >& u_gradphi =
      context.get_element_fe(this->_flow_vars.u())->get_dphi();

    libMesh::DenseSubVector<libMesh::Number> &Fu = context.get_elem_residual(this->_flow_vars.u()); // R_{u}
    libMesh::DenseSubVector<libMesh::Number> &Fv = context.get_elem_residual(this->_flow_vars.v()); // R_{v}
    libMesh::DenseSubVector<libMesh::Number> *Fw = NULL;
    if(this->_flow_vars.dim() == 3)
      Fw = &context.get_elem_residual(this->_flow_vars.w()); // R_{w}

    libMesh::FEBase* fe = context.get_element_fe(this->_flow_vars.u());

    unsigned int n_qpoints = context.get_element_qrule().n_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.interior_value( this->_flow_vars.u(), qp ),
                                 context.interior_value( this->_flow_vars.v(), qp ) );
        if( this->_flow_vars.dim() == 3 )
          {
            U(2) = context.interior_value( this->_flow_vars.w(), qp );
          }

        // Compute the viscosity at this qp
        libMesh::Real _mu_qp = this->_mu(context, qp);

        libMesh::Real tau_M = this->_stab_helper.compute_tau_momentum( context, qp, g, G, this->_rho, U, _mu_qp, this->_is_steady );
        libMesh::Real tau_C = this->_stab_helper.compute_tau_continuity( tau_M, g );

        libMesh::RealGradient RM_s = this->_stab_helper.compute_res_momentum_steady( context, qp, this->_rho, _mu_qp );
        libMesh::Real RC = this->_stab_helper.compute_res_continuity( context, qp );

        for (unsigned int i=0; i != n_u_dofs; i++)
          {
            Fu(i) += ( - tau_C*RC*u_gradphi[i][qp](0)
                       - tau_M*RM_s(0)*this->_rho*U*u_gradphi[i][qp]  )*JxW[qp];

            Fv(i) += ( - tau_C*RC*u_gradphi[i][qp](1)
                       - tau_M*RM_s(1)*this->_rho*U*u_gradphi[i][qp] )*JxW[qp];

            if( this->_flow_vars.dim() == 3 )
              {
                (*Fw)(i) += ( - tau_C*RC*u_gradphi[i][qp](2)
                              - tau_M*RM_s(2)*this->_rho*U*u_gradphi[i][qp] )*JxW[qp];
              }
          }

        if( compute_jacobian )
          libmesh_not_implemented();
      }
  }

template<class Mu >

void GRINS::IncompressibleNavierStokesSPGSMStabilization< 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::Physics.

Definition at line 166 of file inc_navier_stokes_spgsm_stab.C.

  {
    // The number of local degrees of freedom in each variable.
    const unsigned int n_p_dofs = context.get_dof_indices(this->_press_var.p()).size();
    const unsigned int n_u_dofs = context.get_dof_indices(this->_flow_vars.u()).size();

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

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

    const std::vector<std::vector<libMesh::RealGradient> >& u_gradphi =
      context.get_element_fe(this->_flow_vars.u())->get_dphi();

    libMesh::DenseSubVector<libMesh::Number> &Fu = context.get_elem_residual(this->_flow_vars.u()); // R_{p}
    libMesh::DenseSubVector<libMesh::Number> &Fv = context.get_elem_residual(this->_flow_vars.v()); // R_{p}
    libMesh::DenseSubVector<libMesh::Number> *Fw = NULL;


    if(this->_flow_vars.dim() == 3)
      Fw = &context.get_elem_residual(this->_flow_vars.w()); // R_{w}

    libMesh::DenseSubVector<libMesh::Number> &Fp = context.get_elem_residual(this->_press_var.p()); // R_{p}

    libMesh::FEBase* fe = context.get_element_fe(this->_flow_vars.u());

    unsigned int n_qpoints = context.get_element_qrule().n_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_M = this->_stab_helper.compute_tau_momentum( context, qp, g, G, this->_rho, U, _mu_qp, false );

        libMesh::RealGradient RM_t = this->_stab_helper.compute_res_momentum_transient( context, qp, this->_rho );

        for (unsigned int i=0; i != n_p_dofs; i++)
          {
            Fp(i) -= tau_M*RM_t*p_dphi[i][qp]*JxW[qp];
          }

        for (unsigned int i=0; i != n_u_dofs; i++)
          {
            Fu(i) -= tau_M*RM_t(0)*this->_rho*U*u_gradphi[i][qp]*JxW[qp];

            Fv(i) -= tau_M*RM_t(1)*this->_rho*U*u_gradphi[i][qp]*JxW[qp];

            if( this->_flow_vars.dim() == 3 )
              {
                (*Fw)(i) -= tau_M*RM_t(2)*this->_rho*U*u_gradphi[i][qp]*JxW[qp];
              }
          }

        if( compute_jacobian )
          {
            libmesh_not_implemented();
          }

      }
  }

---

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

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