olb::SlipBoundaryProcessor3D< T, DESCRIPTOR > Class Template Reference

This class computes a slip BC in 3D. More...

#include <boundaryPostProcessors3D.h>

Inheritance diagram for olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >:

Collaboration diagram for olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >:

Public Member Functions
	SlipBoundaryProcessor3D (int x0_, int x1_, int y0_, int y1_, int z0_, int z1_, int discreteNormalX_, int discreteNormalY_, int discreteNormalZ_)
int	extent () const override
	Extent of application area (0 for purely local operations)
int	extent (int whichDirection) const override
	Extent of application area along a direction (0 or 1)
void	process (BlockLattice< T, DESCRIPTOR > &blockLattice) override
	Execute post-processing step.
void	processSubDomain (BlockLattice< T, DESCRIPTOR > &blockLattice, int x0_, int x1_, int y0_, int y1_, int z0_, int z1_) override
	Execute post-processing step on a sublattice.
Public Member Functions inherited from olb::PostProcessor3D< T, DESCRIPTOR >
	PostProcessor3D ()
virtual	~PostProcessor3D ()
std::string &	getName ()
	read and write access to name
std::string const &	getName () const
	read only access to name
int	getPriority () const
	read only access to priority

Additional Inherited Members
Protected Attributes inherited from olb::PostProcessor3D< T, DESCRIPTOR >
int	_priority

Detailed Description

template<typename T, typename DESCRIPTOR>
class olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >

This class computes a slip BC in 3D.

Definition at line 127 of file boundaryPostProcessors3D.h.

Constructor & Destructor Documentation

SlipBoundaryProcessor3D()

template<typename T , typename DESCRIPTOR >

olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >::SlipBoundaryProcessor3D	(	int	x0_,
		int	x1_,
		int	y0_,
		int	y1_,
		int	z0_,
		int	z1_,
		int	discreteNormalX_,
		int	discreteNormalY_,
		int	discreteNormalZ_ )

Definition at line 293 of file boundaryPostProcessors3D.hh.

  : x0(x0_), x1(x1_), y0(y0_), y1(y1_), z0(z0_), z1(z1_)
{
  this->getName() = "SlipBoundaryProcessor3D";
  OLB_PRECONDITION(x0==x1 || y0==y1 || z0==z1);
  int mirrorDirection0;
  int mirrorDirection1;
  int mirrorDirection2;
  int mult = 2 / (discreteNormalX*discreteNormalX + discreteNormalY*discreteNormalY + discreteNormalZ*discreteNormalZ);
  reflectionPop[0] = 0;
  for (int iPop = 1; iPop < DESCRIPTOR::q; iPop++) {
    reflectionPop[iPop] = 0;
    // iPop are the directions which pointing into the fluid, discreteNormal is pointing outwarts
    int scalarProduct = descriptors::c<DESCRIPTOR>(iPop,0)*discreteNormalX + descriptors::c<DESCRIPTOR>(iPop,1)*discreteNormalY + descriptors::c<DESCRIPTOR>(iPop,2)*discreteNormalZ;
    if ( scalarProduct < 0) {
      // bounce back for the case discreteNormalX = discreteNormalY = discreteNormalZ = 1, that is mult=0
      if (mult == 0) {
        mirrorDirection0 = -descriptors::c<DESCRIPTOR>(iPop,0);
        mirrorDirection1 = -descriptors::c<DESCRIPTOR>(iPop,1);
        mirrorDirection2 = -descriptors::c<DESCRIPTOR>(iPop,2);
      }
      else {
        mirrorDirection0 = descriptors::c<DESCRIPTOR>(iPop,0) - mult*scalarProduct*discreteNormalX;
        mirrorDirection1 = descriptors::c<DESCRIPTOR>(iPop,1) - mult*scalarProduct*discreteNormalY;
        mirrorDirection2 = descriptors::c<DESCRIPTOR>(iPop,2) - mult*scalarProduct*discreteNormalZ;
      }
 
      // run through all lattice directions and look for match of direction
      for (int i = 1; i < DESCRIPTOR::q; i++) {
        if (descriptors::c<DESCRIPTOR>(i,0)==mirrorDirection0
            && descriptors::c<DESCRIPTOR>(i,1)==mirrorDirection1
            && descriptors::c<DESCRIPTOR>(i,2)==mirrorDirection2) {
          reflectionPop[iPop] = i;
          break;
        }
      }
    }
  }
}

References olb::PostProcessor3D< T, DESCRIPTOR >::getName(), and OLB_PRECONDITION.

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Member Function Documentation

extent() [1/2]

template<typename T , typename DESCRIPTOR >

int olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >::extent ( ) const

inlineoverridevirtual

Extent of application area (0 for purely local operations)

Implements olb::PostProcessor3D< T, DESCRIPTOR >.

Definition at line 130 of file boundaryPostProcessors3D.h.

  {
    return 0;
  }

extent() [2/2]

template<typename T , typename DESCRIPTOR >

int olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >::extent ( int direction ) const

inlineoverridevirtual

Extent of application area along a direction (0 or 1)

Implements olb::PostProcessor3D< T, DESCRIPTOR >.

Definition at line 134 of file boundaryPostProcessors3D.h.

  {
    return 0;
  }

process()

template<typename T , typename DESCRIPTOR >

void olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >::process ( BlockLattice< T, DESCRIPTOR > & blockLattice )

overridevirtual

Execute post-processing step.

Implements olb::PostProcessor3D< T, DESCRIPTOR >.

Definition at line 364 of file boundaryPostProcessors3D.hh.

{
  processSubDomain(blockLattice, x0, x1, y0, y1, z0, z1);
}

processSubDomain()

template<typename T , typename DESCRIPTOR >

void olb::SlipBoundaryProcessor3D< T, DESCRIPTOR >::processSubDomain ( BlockLattice< T, DESCRIPTOR > & blockLattice, int x0_, int x1_, int y0_, int y1_, int z0_, int z1_ )

overridevirtual

Execute post-processing step on a sublattice.

Implements olb::PostProcessor3D< T, DESCRIPTOR >.

Definition at line 335 of file boundaryPostProcessors3D.hh.

{
  int newX0, newX1, newY0, newY1, newZ0, newZ1;
  if ( util::intersect (
         x0, x1, y0, y1, z0, z1,
         x0_, x1_, y0_, y1_, z0_, z1_,
         newX0, newX1, newY0, newY1, newZ0, newZ1 ) ) {
 
    int iX;
#ifdef PARALLEL_MODE_OMP
    #pragma omp parallel for
#endif
    for (iX=x0; iX<=x1; ++iX) {
      for (int iY=y0; iY<=y1; ++iY) {
        for (int iZ=z0; iZ<=z1; ++iZ) {
          for (int iPop = 1; iPop < DESCRIPTOR::q ; ++iPop) {
            if (reflectionPop[iPop]!=0) {
              //do reflection
              blockLattice.get(iX,iY,iZ)[iPop] = blockLattice.get(iX,iY,iZ)[reflectionPop[iPop]];
            }
          }
        }
      }
    }
  }
}

References olb::BlockLattice< T, DESCRIPTOR >::get(), and olb::util::intersect().

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

• src/boundary/boundaryPostProcessors3D.h
• src/boundary/boundaryPostProcessors3D.hh