Defines incoming directions on flat walls. More...

#include <rtlbmBoundaryDynamics.h>

Inheritance diagram for olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >:

Collaboration diagram for olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >:

Public Types
template<typename M >
using	exchange_momenta = RtlbmDiffuseConstBoundaryDynamics<T,DESCRIPTOR,M,direction,orientation>

Public Types inherited from olb::dynamics::CustomCollision< T, DESCRIPTOR, MOMENTA >
using	value_t = T

using	descriptor_t = DESCRIPTOR

using	MomentaF = typename MOMENTA::template type<DESCRIPTOR>

Public Types inherited from olb::Dynamics< T, DESCRIPTOR >
using	value_t = T

using	descriptor_t = DESCRIPTOR

Public Member Functions
	RtlbmDiffuseConstBoundaryDynamics (T omega_)
	Constructor.

T	computeEquilibrium (int iPop, T rho, const T u[DESCRIPTOR::d]) const override
	Compute equilibrium distribution function.

CellStatistic< T >	collide (Cell< T, DESCRIPTOR > &cell) override
	Collision step for flat boundary.

T	getOmega () const
	place holder

void	setOmega (T omega_)
	place holder

Public Member Functions inherited from olb::legacy::BasicDynamics< T, DESCRIPTOR, MOMENTA >
std::type_index	id () override
	Expose unique type-identifier for RTTI.

AbstractParameters< T, DESCRIPTOR > &	getParameters (BlockLattice< T, DESCRIPTOR > &block) override
	Parameters access for legacy post processors.

Public Member Functions inherited from olb::dynamics::CustomCollision< T, DESCRIPTOR, MOMENTA >
void	initialize (Cell< T, DESCRIPTOR > &cell) override
	Initialize dynamics-specific data for cell.

T	computeRho (ConstCell< T, DESCRIPTOR > &cell) const override
	Compute particle density.

void	computeU (ConstCell< T, DESCRIPTOR > &cell, T u[DESCRIPTOR::d]) const override
	Compute fluid velocity.

void	computeJ (ConstCell< T, DESCRIPTOR > &cell, T j[DESCRIPTOR::d]) const override
	Compute fluid momentum.

void	computeStress (ConstCell< T, DESCRIPTOR > &cell, T rho, const T u[DESCRIPTOR::d], T pi[util::TensorVal< DESCRIPTOR >::n]) const override
	Compute stress tensor.

void	computeRhoU (ConstCell< T, DESCRIPTOR > &cell, T &rho, T u[DESCRIPTOR::d]) const override
	Compute fluid velocity and particle density.

void	computeAllMomenta (ConstCell< T, DESCRIPTOR > &cell, T &rho, T u[DESCRIPTOR::d], T pi[util::TensorVal< DESCRIPTOR >::n]) const override
	Compute all momenta up to second order.

void	defineRho (Cell< T, DESCRIPTOR > &cell, T rho) override
	Set particle density.

void	defineU (Cell< T, DESCRIPTOR > &cell, const T u[DESCRIPTOR::d]) override
	Set fluid velocity.

void	defineRhoU (Cell< T, DESCRIPTOR > &cell, T rho, const T u[DESCRIPTOR::d]) override
	Define fluid velocity and particle density.

void	defineAllMomenta (Cell< T, DESCRIPTOR > &cell, T rho, const T u[DESCRIPTOR::d], const T pi[util::TensorVal< DESCRIPTOR >::n]) override
	Define all momenta up to second order.

void	inverseShiftRhoU (ConstCell< T, DESCRIPTOR > &cell, T &rho, T u[DESCRIPTOR::d]) const override
	Calculate population momenta s.t. the physical momenta are reproduced by the computeRhoU.

Public Member Functions inherited from olb::Dynamics< T, DESCRIPTOR >
virtual	~Dynamics () any_platform

virtual std::string	getName () const
	Return human-readable name.

void	iniEquilibrium (Cell< T, DESCRIPTOR > &cell, T rho, const T u[DESCRIPTOR::d])
	Initialize to equilibrium distribution.

void	iniRegularized (Cell< T, DESCRIPTOR > &cell, T rho, const T u[DESCRIPTOR::d], const T pi[util::TensorVal< DESCRIPTOR >::n])
	Initialize cell to equilibrium and non-equilibrum part.

Detailed Description

template<typename T, typename DESCRIPTOR, typename MOMENTA, int direction, int orientation>
class olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >

Defines incoming directions on flat walls.

Emposed dirichlet density is distributed equivalently to all incoming/unkown directions.

Parameters

directions	takes values 0, 1, 2; which corresponds to x, y, z plane normal
orientation	takes values -1, 1; which is the sign of plane normal

Note: Dynamics ensure that cell has constant 0th moment. To set the constant 0th moment defineRho() must be called.

Definition at line 107 of file rtlbmBoundaryDynamics.h.

Member Typedef Documentation

◆ exchange_momenta

template<typename T , typename DESCRIPTOR , typename MOMENTA , int direction, int orientation>

template<typename M >

using olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >::exchange_momenta = RtlbmDiffuseConstBoundaryDynamics<T,DESCRIPTOR,M,direction,orientation>

Definition at line 110 of file rtlbmBoundaryDynamics.h.

Constructor & Destructor Documentation

◆ RtlbmDiffuseConstBoundaryDynamics()

template<typename T , typename DESCRIPTOR , typename MOMENTA , int direction, int orientation>

olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >::RtlbmDiffuseConstBoundaryDynamics ( T omega_ )

Constructor.

Definition at line 171 of file rtlbmBoundaryDynamics.hh.

  : legacy::BasicDynamics<T,DESCRIPTOR,MOMENTA>()
{
  this->getName() = "RtlbmDiffuseConstBoundaryDynamics";
}

References olb::Dynamics< T, DESCRIPTOR >::getName().

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Member Function Documentation

◆ collide()

template<typename T , typename DESCRIPTOR , typename MOMENTA , int direction, int orientation>

CellStatistic< T > olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >::collide ( Cell< T, DESCRIPTOR > & cell )

overridevirtual

Collision step for flat boundary.

Reimplemented from olb::Dynamics< T, DESCRIPTOR >.

Definition at line 184 of file rtlbmBoundaryDynamics.hh.

{
  // For direction i \in I_in define
  // cell_i = w_i * dirichlet/sumWeights - w_i
  // For direction i \in I_out defube
  // cell_i = - w_i
  // This construction yields
  // sum_{i=0}^{q-1} cell_i == dirichlet - 1
 
  typedef DESCRIPTOR L;
  // shift all: cell_i = f_i - weight_i
  for ( int iPop = 0; iPop < L::q; ++iPop ) {
    cell[iPop] = - descriptors::t<T,L>(iPop);
  }
 
  constexpr auto missing_iPop = util::subIndexOutgoing<L,direction,orientation>();
  // compute summ of weights for all missing directions
  T sumWeights = 0;
  for ( int i : missing_iPop ) {
    sumWeights += descriptors::t<T,L>(i);
  }
  // construct missing directions such that 0th moment equals emposed dirichletTemperature
  using MomentaF = typename MOMENTA::template type<DESCRIPTOR>;
  T dirichletTemperature = MomentaF().computeRho(cell);
  for ( int i : missing_iPop ) {
    cell[i] = descriptors::t<T,L>(i)*dirichletTemperature/sumWeights - descriptors::t<T,L>(i);
  }
  return {-1, -1};
}

◆ computeEquilibrium()

template<typename T , typename DESCRIPTOR , typename MOMENTA , int direction, int orientation>

T olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >::computeEquilibrium	(	int	iPop,
		T	rho,
		const T	u[DESCRIPTOR::d] ) const

overridevirtual

Compute equilibrium distribution function.

Reimplemented from olb::legacy::BasicDynamics< T, DESCRIPTOR, MOMENTA >.

Definition at line 178 of file rtlbmBoundaryDynamics.hh.

{
  return descriptors::t<T,DESCRIPTOR>(iPop)*rho - descriptors::t<T,DESCRIPTOR>(iPop);
}

◆ getOmega()

template<typename T , typename DESCRIPTOR , typename MOMENTA , int direction, int orientation>

T olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >::getOmega ( ) const

place holder

Definition at line 215 of file rtlbmBoundaryDynamics.hh.

{
  return T(-1);
}

◆ setOmega()

template<typename T , typename DESCRIPTOR , typename MOMENTA , int direction, int orientation>

void olb::RtlbmDiffuseConstBoundaryDynamics< T, DESCRIPTOR, MOMENTA, direction, orientation >::setOmega ( T omega_ )

place holder

Definition at line 221 of file rtlbmBoundaryDynamics.hh.

222{

223}

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

src/boundary/rtlbmBoundaryDynamics.h
src/boundary/rtlbmBoundaryDynamics.hh

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ exchange_momenta

Constructor & Destructor Documentation

◆ RtlbmDiffuseConstBoundaryDynamics()

Member Function Documentation

◆ collide()

◆ computeEquilibrium()

◆ getOmega()

◆ setOmega()