GRINS::LowMachNavierStokesStabilizationBase< Viscosity, SpecificHeat, ThermalConductivity > Class Template Reference

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

#include <low_mach_navier_stokes_stab_base.h>

Inheritance diagram for GRINS::LowMachNavierStokesStabilizationBase< Viscosity, SpecificHeat, ThermalConductivity >:

Collaboration diagram for GRINS::LowMachNavierStokesStabilizationBase< Viscosity, SpecificHeat, ThermalConductivity >:

Public Member Functions
	LowMachNavierStokesStabilizationBase (const GRINS::PhysicsName &physics_name, const GetPot &input)
virtual	~LowMachNavierStokesStabilizationBase ()
virtual void	init_context (AssemblyContext &context)
	Initialize context for added physics variables. More...
libMesh::Real	compute_res_continuity_steady (AssemblyContext &context, unsigned int qp) const
libMesh::Real	compute_res_continuity_transient (AssemblyContext &context, unsigned int qp) const
libMesh::RealGradient	compute_res_momentum_steady (AssemblyContext &context, unsigned int qp) const
libMesh::RealGradient	compute_res_momentum_transient (AssemblyContext &context, unsigned int qp) const
libMesh::Real	compute_res_energy_steady (AssemblyContext &context, unsigned int qp) const
libMesh::Real	compute_res_energy_transient (AssemblyContext &context, unsigned int qp) const
Public Member Functions inherited from GRINS::LowMachNavierStokesBase< Viscosity, SpecificHeat, ThermalConductivity >
	LowMachNavierStokesBase (const PhysicsName &physics_name, const std::string &core_physics_name, const GetPot &input)
	~LowMachNavierStokesBase ()
virtual void	init_variables (libMesh::FEMSystem *system)
	Initialize variables for this physics. More...
virtual void	set_time_evolving_vars (libMesh::FEMSystem *system)
	Sets velocity variables to be time-evolving. More...
libMesh::Real	T (const libMesh::Point &p, const AssemblyContext &c) const
libMesh::Real	rho (libMesh::Real T, libMesh::Real p0) const
libMesh::Real	d_rho_dT (libMesh::Real T, libMesh::Real p0) const
libMesh::Real	get_p0_steady (const AssemblyContext &c, unsigned int qp) const
libMesh::Real	get_p0_steady_side (const AssemblyContext &c, unsigned int qp) const
libMesh::Real	get_p0_steady (const AssemblyContext &c, const libMesh::Point &p) const
libMesh::Real	get_p0_transient (AssemblyContext &c, unsigned int qp) const
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::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	element_time_derivative (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Time dependent part(s) of physics for element interiors. More...
virtual void	side_time_derivative (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Time dependent part(s) of physics for boundaries of elements on the domain boundary. More...
virtual void	nonlocal_time_derivative (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Time dependent part(s) of physics for scalar variables. More...
virtual void	element_constraint (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Constraint part(s) of physics for element interiors. More...
virtual void	side_constraint (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Constraint part(s) of physics for boundaries of elements on the domain boundary. More...
virtual void	nonlocal_constraint (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Constraint part(s) of physics for scalar variables. More...
virtual void	damping_residual (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Damping matrix part(s) for element interiors. All boundary terms lie within the time_derivative part. More...
virtual void	mass_residual (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	Mass matrix part(s) for element interiors. All boundary terms lie within the time_derivative part. More...
virtual void	nonlocal_mass_residual (bool compute_jacobian, AssemblyContext &context, CachedValues &cache)
	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 (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_side_time_derivative_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_nonlocal_time_derivative_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_element_constraint_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_side_constraint_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_nonlocal_constraint_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_damping_residual_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_mass_residual_cache (const AssemblyContext &context, CachedValues &cache)
virtual void	compute_nonlocal_mass_residual_cache (const AssemblyContext &context, CachedValues &cache)
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...

Protected Attributes
LowMachNavierStokesStabilizationHelper	_stab_helper
Protected Attributes inherited from GRINS::LowMachNavierStokesBase< Viscosity, SpecificHeat, ThermalConductivity >
libMesh::Number	_p0_over_R
	Thermodynamic pressure divided by gas constant. More...
libMesh::Number	_p0
libMesh::Number	_R
libMesh::Number	_T0
unsigned int	_dim
	Physical dimension of problem. More...
VelocityFEVariables	_flow_vars
PressureFEVariable	_press_var
PrimitiveTempFEVariables	_temp_vars
libMesh::UniquePtr< ThermoPressureFEVariable >	_p0_var
Viscosity	_mu
	Viscosity object. More...
SpecificHeat	_cp
	Specific heat object. More...
ThermalConductivity	_k
	Thermal conductivity object. More...
libMesh::Point	_g
	Gravity vector. More...
bool	_enable_thermo_press_calc
	Flag to enable thermodynamic pressure calculation. 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...

Private Member Functions
	LowMachNavierStokesStabilizationBase ()

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)
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 SpecificHeat, class ThermalConductivity>
class GRINS::LowMachNavierStokesStabilizationBase< Viscosity, SpecificHeat, ThermalConductivity >

Adds VMS-based stabilization to LowMachNavierStokes physics class.

Definition at line 37 of file low_mach_navier_stokes_stab_base.h.

Constructor & Destructor Documentation

template<class Mu , class SH , class TC >

GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::LowMachNavierStokesStabilizationBase	(	const GRINS::PhysicsName &	physics_name,
		const GetPot &	input
	)

Definition at line 39 of file low_mach_navier_stokes_stab_base.C.

    : LowMachNavierStokesBase<Mu,SH,TC>(physics_name,PhysicsNaming::low_mach_navier_stokes(),input),
      _stab_helper( physics_name+"StabHelper", input )
  {
    return;
  }

template<class Mu , class SH , class TC >

GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::~LowMachNavierStokesStabilizationBase ( )

virtual

Definition at line 48 of file low_mach_navier_stokes_stab_base.C.

  {
    return;
  }

template<class Viscosity , class SpecificHeat , class ThermalConductivity >

GRINS::LowMachNavierStokesStabilizationBase< Viscosity, SpecificHeat, ThermalConductivity >::LowMachNavierStokesStabilizationBase ( )

private

Member Function Documentation

template<class Mu , class SH , class TC >

libMesh::Real GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::compute_res_continuity_steady	(	AssemblyContext &	context,
		unsigned int	qp
	)		const

Definition at line 70 of file low_mach_navier_stokes_stab_base.C.

  {
    libMesh::Real T = context.fixed_interior_value(this->_temp_vars.T(), qp);
    libMesh::RealGradient grad_T = context.fixed_interior_gradient(this->_temp_vars.T(), qp);

    libMesh::RealGradient U( context.fixed_interior_value(this->_flow_vars.u(), qp),
                             context.fixed_interior_value(this->_flow_vars.v(), qp) );

    libMesh::RealGradient grad_u, grad_v;

    grad_u = context.fixed_interior_gradient(this->_flow_vars.u(), qp);
    grad_v = context.fixed_interior_gradient(this->_flow_vars.v(), qp);

    libMesh::Real divU = grad_u(0) + grad_v(1);

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

    return divU - (U*grad_T)/T;
  }

template<class Mu , class SH , class TC >

libMesh::Real GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::compute_res_continuity_transient	(	AssemblyContext &	context,
		unsigned int	qp
	)		const

Definition at line 96 of file low_mach_navier_stokes_stab_base.C.

  {
    libMesh::Real T = context.fixed_interior_value(this->_temp_vars.T(), qp);
    libMesh::Real T_dot = context.interior_value(this->_temp_vars.T(), qp);

    libMesh::Real RC_t = -T_dot/T;

    if( this->_enable_thermo_press_calc )
      {
        libMesh::Real p0 = context.fixed_interior_value(this->_p0_var->p0(), qp);
        libMesh::Real p0_dot = context.interior_value(this->_p0_var->p0(), qp);

        RC_t += p0_dot/p0;
      }

    return RC_t;
  }

template<class Mu , class SH , class TC >

libMesh::Real GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::compute_res_energy_steady	(	AssemblyContext &	context,
		unsigned int	qp
	)		const

Definition at line 220 of file low_mach_navier_stokes_stab_base.C.

  {
    libMesh::Real T = context.fixed_interior_value(this->_temp_vars.T(), qp);
    libMesh::Gradient grad_T = context.fixed_interior_gradient(this->_temp_vars.T(), qp);
    libMesh::Tensor hess_T = context.fixed_interior_hessian(this->_temp_vars.T(), qp);

    libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );
    libMesh::Real rho_cp = rho*this->_cp(T);

    libMesh::RealGradient rhocpU( rho_cp*context.fixed_interior_value(this->_flow_vars.u(), qp),
                                  rho_cp*context.fixed_interior_value(this->_flow_vars.v(), qp) );
    if(this->_dim == 3)
      rhocpU(2) = rho_cp*context.fixed_interior_value(this->_flow_vars.w(), qp);

    libMesh::Real hess_term = hess_T(0,0) + hess_T(1,1);
#if LIBMESH_DIM > 2
    hess_term += hess_T(2,2);
#endif

    return rhocpU*grad_T - this->_k.deriv(T)*(grad_T*grad_T) - this->_k(T)*(hess_term);
  }

template<class Mu , class SH , class TC >

libMesh::Real GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::compute_res_energy_transient	(	AssemblyContext &	context,
		unsigned int	qp
	)		const

Definition at line 245 of file low_mach_navier_stokes_stab_base.C.

  {
    libMesh::Real T = context.fixed_interior_value(this->_temp_vars.T(), qp);
    libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );
    libMesh::Real rho_cp = rho*this->_cp(T);
    libMesh::Real T_dot = context.interior_value(this->_temp_vars.T(), qp);

    libMesh::Real RE_t = rho_cp*T_dot;

    if( this->_enable_thermo_press_calc )
      {
        RE_t -= context.interior_value(this->_p0_var->p0(), qp);
      }
  
    return RE_t;
  }

template<class Mu , class SH , class TC >

libMesh::RealGradient GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::compute_res_momentum_steady	(	AssemblyContext &	context,
		unsigned int	qp
	)		const

Definition at line 116 of file low_mach_navier_stokes_stab_base.C.

  {
    libMesh::Real T = context.fixed_interior_value(this->_temp_vars.T(), qp);

    libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );

    libMesh::RealGradient U( context.fixed_interior_value(this->_flow_vars.u(), qp),
                             context.fixed_interior_value(this->_flow_vars.v(), qp) );
    if(this->_dim == 3)
      U(2) = context.fixed_interior_value(this->_flow_vars.w(), qp);

    libMesh::RealGradient grad_p = context.fixed_interior_gradient(this->_press_var.p(), qp);

    libMesh::RealGradient grad_u = context.fixed_interior_gradient(this->_flow_vars.u(), qp);
    libMesh::RealGradient grad_v = context.fixed_interior_gradient(this->_flow_vars.v(), qp);

    libMesh::RealTensor hess_u = context.fixed_interior_hessian(this->_flow_vars.u(), qp);
    libMesh::RealTensor hess_v = context.fixed_interior_hessian(this->_flow_vars.v(), qp);

    libMesh::RealGradient rhoUdotGradU;
    libMesh::RealGradient divGradU;
    libMesh::RealGradient divGradUT;
    libMesh::RealGradient divdivU;

    if( this->_dim < 3 )
      {
        rhoUdotGradU = rho*_stab_helper.UdotGradU( U, grad_u, grad_v );
        divGradU  = _stab_helper.div_GradU( hess_u, hess_v );
        divGradUT = _stab_helper.div_GradU_T( hess_u, hess_v );
        divdivU   = _stab_helper.div_divU_I( hess_u, hess_v );
      }
    else
      {
        libMesh::RealGradient grad_w = context.fixed_interior_gradient(this->_flow_vars.w(), qp);
        libMesh::RealTensor hess_w = context.fixed_interior_hessian(this->_flow_vars.w(), qp);

        rhoUdotGradU = rho*_stab_helper.UdotGradU( U, grad_u, grad_v, grad_w );

        divGradU  = _stab_helper.div_GradU( hess_u, hess_v, hess_w );
        divGradUT = _stab_helper.div_GradU_T( hess_u, hess_v, hess_w );
        divdivU   = _stab_helper.div_divU_I( hess_u, hess_v, hess_w );
      }

    libMesh::RealGradient divT = this->_mu(T)*(divGradU + divGradUT - 2.0/3.0*divdivU);

    if( this->_mu.deriv(T) != 0.0 )
      {
        libMesh::Gradient grad_T = context.fixed_interior_gradient(this->_temp_vars.T(), qp);

        libMesh::Gradient grad_u = context.fixed_interior_gradient(this->_flow_vars.u(), qp);
        libMesh::Gradient grad_v = context.fixed_interior_gradient(this->_flow_vars.v(), qp);

        libMesh::Gradient gradTgradu( grad_T*grad_u, grad_T*grad_v );

        libMesh::Gradient gradTgraduT( grad_T(0)*grad_u(0) + grad_T(1)*grad_u(1),
                                       grad_T(0)*grad_v(0) + grad_T(1)*grad_v(1) );

        libMesh::Real divU = grad_u(0) + grad_v(1);

        libMesh::Gradient gradTdivU( grad_T(0)*divU, grad_T(1)*divU );

        if(this->_dim == 3)
          {
            libMesh::Gradient grad_w = context.fixed_interior_gradient(this->_flow_vars.w(), qp);

            gradTgradu(2) = grad_T*grad_w;

            gradTgraduT(0) += grad_T(2)*grad_u(2);
            gradTgraduT(1) += grad_T(2)*grad_v(2);
            gradTgraduT(2) = grad_T(0)*grad_w(0) + grad_T(1)*grad_w(1) + grad_T(2)*grad_w(2);

            divU += grad_w(2);
            gradTdivU(0) += grad_T(0)*grad_w(2);
            gradTdivU(1) += grad_T(1)*grad_w(2);
            gradTdivU(2) += grad_T(2)*divU;
          }
      
        divT += this->_mu.deriv(T)*( gradTgradu + gradTgraduT - 2.0/3.0*gradTdivU );
      }

    libMesh::RealGradient rhog( rho*this->_g(0), rho*this->_g(1) );
    if(this->_dim == 3)
      rhog(2) = rho*this->_g(2);

    return rhoUdotGradU + grad_p - divT - rhog;
  }

template<class Mu , class SH , class TC >

libMesh::RealGradient GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::compute_res_momentum_transient	(	AssemblyContext &	context,
		unsigned int	qp
	)		const

Definition at line 205 of file low_mach_navier_stokes_stab_base.C.

  {
    libMesh::Real T = context.fixed_interior_value(this->_temp_vars.T(), qp);
    libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );

    libMesh::RealGradient u_dot( context.interior_value(this->_flow_vars.u(), qp), context.interior_value(this->_flow_vars.v(), qp) );

    if(this->_dim == 3)
      u_dot(2) = context.interior_value(this->_flow_vars.w(), qp);

    return rho*u_dot;
  }

template<class Mu , class SH , class TC >

void GRINS::LowMachNavierStokesStabilizationBase< Mu, SH, TC >::init_context ( AssemblyContext &  context )

virtual

Initialize context for added physics variables.

Reimplemented from GRINS::LowMachNavierStokesBase< Viscosity, SpecificHeat, ThermalConductivity >.

Definition at line 54 of file low_mach_navier_stokes_stab_base.C.

References GRINS::LowMachNavierStokesBase< Viscosity, SpecificHeat, ThermalConductivity >::init_context().

  {
    // First call base class
    LowMachNavierStokesBase<Mu,SH,TC>::init_context(context);

    // We need pressure derivatives
    context.get_element_fe(this->_press_var.p())->get_dphi();

    // We also need second derivatives, so initialize those.
    context.get_element_fe(this->_flow_vars.u())->get_d2phi();
    context.get_element_fe(this->_temp_vars.T())->get_d2phi();

    return;
  }

Member Data Documentation

template<class Viscosity , class SpecificHeat , class ThermalConductivity >

LowMachNavierStokesStabilizationHelper GRINS::LowMachNavierStokesStabilizationBase< Viscosity, SpecificHeat, ThermalConductivity >::_stab_helper

protected

Definition at line 69 of file low_mach_navier_stokes_stab_base.h.

---

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

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