[Gloriousface]

There is a problem with the operation,Here is my complete code.

#include “olb2D.h”
#include “olb2D.hh” // use only generic version!
#include <cstdlib>
#include <iostream>

using namespace olb;
using namespace olb::descriptors;
using namespace olb::graphics;
using namespace std;

typedef double T;
typedef D2Q9<VELOCITY,FORCE,EXTERNAL_FORCE,OMEGA> DESCRIPTOR;

// Parameters for the simulation setup
const int nx = 300;
const int ny = 200;
const int maxIter = 20000;

// Stores geometry information in form of material numbers
void prepareGeometry( SuperGeometry2D<T>& superGeometry )
{

OstreamManager clout( std::cout,”prepareGeometry” );
clout << “Prepare Geometry …” << std::endl;

// Sets material number for fluid and boundary
//superGeometry.rename( 0,1 );

Vector<T,2> origin1( 0, 0 );
Vector<T,2> extend1( nx, ny );
IndicatorCuboid2D<T> inner( extend1, origin1 );

superGeometry.rename( 0,2 );
superGeometry.rename( 2,1,1,1 );

Vector<T,2> origin2( 0,0 );
Vector<T,2> extend2( 0, ny );
IndicatorCuboid2D<T> left( extend2, origin2 );
superGeometry.rename( 2,3,1,left );

Vector<T,2> origin3( nx, 0 );
Vector<T,2> extend3( 0, ny );
IndicatorCuboid2D<T> right( extend3, origin3 );
superGeometry.rename( 2,4,1,right );

Vector<T,2> center( nx/2, 30 );
IndicatorCircle2D<T> circle( center, 25 );
superGeometry.rename( 1,5,circle );

// Removes all not needed boundary voxels outside the surface
//superGeometry.clean();
// Removes all not needed boundary voxels inside the surface
superGeometry.innerClean();
superGeometry.checkForErrors();

superGeometry.print();

clout << “Prepare Geometry … OK” << std::endl;
}

void prepareLattice( SuperLattice2D<T, DESCRIPTOR>& sLatticeOne,
SuperLattice2D<T, DESCRIPTOR>& sLatticeTwo,
Dynamics<T, DESCRIPTOR>& bulkDynamics1,
Dynamics<T, DESCRIPTOR>& bulkDynamics2,
Dynamics<T, DESCRIPTOR>& bounceBackRho0,
Dynamics<T, DESCRIPTOR>& bounceBackRho1,
SuperGeometry2D<T>& superGeometry )
{

OstreamManager clout( std::cout,”prepareLattice” );
clout << “Prepare Lattice …” << std::endl;

// The setup is: periodicity along horizontal direction, bounce-back on top
// and bottom. The upper half is initially filled with fluid 1 + random noise,
// and the lower half with fluid 2. Only fluid 1 experiences a forces,
// directed downwards.

const T omega = 1.0;

// define lattice Dynamics
sLatticeOne.defineDynamics( superGeometry, 0, &instances::getNoDynamics<T, DESCRIPTOR>() );
sLatticeTwo.defineDynamics( superGeometry, 0, &instances::getNoDynamics<T, DESCRIPTOR>() );

sLatticeOne.defineDynamics( superGeometry, 1, &bulkDynamics1 );
sLatticeOne.defineDynamics( superGeometry, 2, &bulkDynamics1 );
sLatticeOne.defineDynamics( superGeometry, 3, &bulkDynamics1 );
sLatticeOne.defineDynamics( superGeometry, 4, &bulkDynamics1 );
sLatticeOne.defineDynamics( superGeometry, 5, &bulkDynamics1 );
sLatticeTwo.defineDynamics( superGeometry, 1, &bulkDynamics2 );
sLatticeTwo.defineDynamics( superGeometry, 2, &bulkDynamics2 );
sLatticeTwo.defineDynamics( superGeometry, 3, &bulkDynamics2 );
sLatticeTwo.defineDynamics( superGeometry, 4, &bulkDynamics2 );
sLatticeTwo.defineDynamics( superGeometry, 5, &bulkDynamics2 );

sLatticeOne.defineDynamics( superGeometry, 2, &bounceBackRho0 );
sLatticeTwo.defineDynamics( superGeometry, 2, &bounceBackRho1 );
//sLatticeOne.defineDynamics( superGeometry, 4, &bounceBackRho1 );
//sLatticeTwo.defineDynamics( superGeometry, 4, &bounceBackRho0 );

setLocalVelocityBoundary<T,DESCRIPTOR>(sLatticeOne, omega, superGeometry, 3);
setLocalPressureBoundary<T,DESCRIPTOR>(sLatticeOne, omega, superGeometry, 4);
setLocalVelocityBoundary<T,DESCRIPTOR>(sLatticeTwo, omega, superGeometry, 3);
setLocalPressureBoundary<T,DESCRIPTOR>(sLatticeTwo, omega, superGeometry, 4);

Vector<T,2> center( nx/2,30 );
IndicatorCircle2D<T> circle ( center, 25 );
setBouzidiVelocityBoundary<T,DESCRIPTOR>(sLatticeOne, superGeometry, 5, circle);
setBouzidiVelocityBoundary<T,DESCRIPTOR>(sLatticeTwo, superGeometry, 5, circle);

clout << “Prepare Lattice … OK” << std::endl;
}

void setBoundaryValues( SuperLattice2D<T, DESCRIPTOR>& sLatticeOne,
SuperLattice2D<T, DESCRIPTOR>& sLatticeTwo,
T force, int iT, SuperGeometry2D<T>& superGeometry )
{
if ( iT==0 ) {

AnalyticalConst2D<T,T> noise( 4.e-2 );
std::vector<T> v( 2,T() );
AnalyticalConst2D<T,T> zeroV( v );
AnalyticalConst2D<T,T> zero( 1.e-6 );
AnalyticalLinear2D<T,T> one( 0.,-force*invCs2<T,DESCRIPTOR>(),0.98+force*ny*invCs2<T,DESCRIPTOR>() );
AnalyticalConst2D<T,T> onePlus( 0.98+force*ny/2.*invCs2<T,DESCRIPTOR>() );
AnalyticalRandom2D<T,T> random;
AnalyticalIdentity2D<T,T> randomOne( random*noise+one );
AnalyticalIdentity2D<T,T> randomPlus( random*noise+onePlus );
std::vector<T> F( 2,T() );
F[1] = -force;
AnalyticalConst2D<T,T> f( F );

// for each material set the defineRhou and the Equilibrium

sLatticeOne.defineRhoU( superGeometry, 5, zero, zeroV );
sLatticeOne.iniEquilibrium( superGeometry, 5, zero, zeroV );
sLatticeOne.defineField<descriptors::EXTERNAL_FORCE>( superGeometry, 5, f );
sLatticeTwo.defineRhoU( superGeometry, 5, randomPlus, zeroV );
sLatticeTwo.iniEquilibrium( superGeometry, 5, randomPlus, zeroV );

sLatticeOne.defineRhoU( superGeometry, 1, randomOne, zeroV );
sLatticeOne.iniEquilibrium( superGeometry, 1, randomOne, zeroV );
sLatticeOne.defineField<descriptors::EXTERNAL_FORCE>( superGeometry, 1, f );
sLatticeTwo.defineRhoU( superGeometry, 1, zero, zeroV );
sLatticeTwo.iniEquilibrium( superGeometry, 1, zero, zeroV );

sLatticeOne.defineRhoU(superGeometry, 2, zero, zeroV);
sLatticeOne.iniEquilibrium(superGeometry, 2, zero, zeroV);
sLatticeOne.defineField<descriptors::EXTERNAL_FORCE>(superGeometry, 2, f);
sLatticeTwo.defineRhoU(superGeometry, 2, one, zeroV);
sLatticeTwo.iniEquilibrium(superGeometry, 2, one, zeroV);

sLatticeOne.defineRhoU(superGeometry, 3, one, zeroV);
sLatticeOne.iniEquilibrium(superGeometry, 3, one, zeroV);
sLatticeOne.defineField<descriptors::EXTERNAL_FORCE>(superGeometry, 3, f);
sLatticeTwo.defineRhoU(superGeometry, 3, zero, zeroV);
sLatticeTwo.iniEquilibrium(superGeometry, 3, zero, zeroV);

sLatticeOne.defineRhoU(superGeometry, 4, one, zeroV);
sLatticeOne.iniEquilibrium(superGeometry, 4, one, zeroV);
sLatticeOne.defineField<descriptors::EXTERNAL_FORCE>(superGeometry, 4, f);
sLatticeTwo.defineRhoU(superGeometry, 4, zero, zeroV);
sLatticeTwo.iniEquilibrium(superGeometry, 4, zero, zeroV);

PolynomialStartScale<T,T> StartScale( 20000, T( 1 ) );

// Creates and sets the Poiseuille inflow profile using functors
T iTvec[1] = {T( iT )};
T frac[1] = {};
StartScale( frac,iTvec );
T maxVelocity = 0.1*3./2.*frac[0];
T distance2Wall = 0.01/2.;
Poiseuille2D<T> poiseuilleU( superGeometry, 3, maxVelocity, distance2Wall );

sLatticeOne.defineU( superGeometry, 3, poiseuilleU );
sLatticeTwo.defineU( superGeometry, 3, poiseuilleU );
//sLatticeOne.defineUBouzidi( superGeometry, 5, poiseuilleU );
//sLatticeTwo.defineUBouzidi( superGeometry, 5, poiseuilleU );
defineUBouzidi<T,DESCRIPTOR>(sLatticeOne, superGeometry,5,poiseuilleU );
defineUBouzidi<T,DESCRIPTOR>(sLatticeTwo, superGeometry,5,poiseuilleU );
// Make the lattice ready for simulation
sLatticeOne.initialize();
sLatticeTwo.initialize();
}
}

void getResults( SuperLattice2D<T, DESCRIPTOR>& sLatticeTwo,
SuperLattice2D<T, DESCRIPTOR>& sLatticeOne, int iT,
SuperGeometry2D<T>& superGeometry, Timer<T>& timer )
{

OstreamManager clout( std::cout,”getResults” );
SuperVTMwriter2D<T> vtmWriter( “rayleighTaylor2dsLatticeOne” );

const int vtkIter = 100;
const int statIter = 10;

if ( iT==0 ) {
// Writes the geometry, cuboid no. and rank no. as vti file for visualization
SuperLatticeGeometry2D<T, DESCRIPTOR> geometry( sLatticeOne, superGeometry );
SuperLatticeCuboid2D<T, DESCRIPTOR> cuboid( sLatticeOne );
SuperLatticeRank2D<T, DESCRIPTOR> rank( sLatticeOne );
vtmWriter.write( geometry );
vtmWriter.write( cuboid );
vtmWriter.write( rank );
vtmWriter.createMasterFile();
}

// Get statistics
if ( iT%statIter==0 && iT > 0 ) {
// Timer console output
timer.update( iT );
timer.printStep();

clout << “averageRhoFluidOne=” << sLatticeOne.getStatistics().getAverageRho();
clout << “; averageRhoFluidTwo=” << sLatticeTwo.getStatistics().getAverageRho() << std::endl;
}

// Writes the VTK files
if ( iT%vtkIter==0 ) {
clout << “Writing VTK …” << std::endl;
SuperLatticeVelocity2D<T, DESCRIPTOR> velocity( sLatticeOne );
SuperLatticeDensity2D<T, DESCRIPTOR> density( sLatticeOne );
vtmWriter.addFunctor( velocity );
vtmWriter.addFunctor( density );
vtmWriter.write( iT );

BlockReduction2D2D<T> planeReduction( density, 600, BlockDataSyncMode::ReduceOnly );
// write output as JPEG
heatmap::write(planeReduction, iT);

clout << “Writing VTK … OK” << std::endl;
}
}

int main( int argc, char *argv[] )
{

// === 1st Step: Initialization ===

olbInit( &argc, &argv );
singleton::directories().setOutputDir( “./tmp/” );
OstreamManager clout( std::cout,”main” );

const T omega1 = 1.0;
const T omega2 = 1.0;
const T G = 3.;
T force = 30./( T )ny/( T )ny;

// === 2nd Step: Prepare Geometry ===
// Instantiation of a cuboidGeometry with weights

#ifdef PARALLEL_MODE_MPI
CuboidGeometry2D<T> cGeometry( 0, 0, 1, nx, ny, singleton::mpi().getSize() );
#else
CuboidGeometry2D<T> cGeometry( 0, 0, 1, nx, ny, 1 );
#endif

cGeometry.setPeriodicity( true, false );

HeuristicLoadBalancer<T> loadBalancer( cGeometry );

SuperGeometry2D<T> superGeometry( cGeometry, loadBalancer, 2 );

prepareGeometry( superGeometry );

// === 3rd Step: Prepare Lattice ===

SuperLattice2D<T, DESCRIPTOR> sLatticeOne( superGeometry );
SuperLattice2D<T, DESCRIPTOR> sLatticeTwo( superGeometry );

ForcedBGKdynamics<T, DESCRIPTOR> bulkDynamics1 (
omega1, instances::getExternalVelocityMomenta<T,DESCRIPTOR>() );
ForcedBGKdynamics<T, DESCRIPTOR> bulkDynamics2 (
omega2, instances::getExternalVelocityMomenta<T,DESCRIPTOR>() );

// A bounce-back node with fictitious density 1,
// which is experienced by the partner fluid
BounceBack<T, DESCRIPTOR> bounceBackRho1( 1. );
// A bounce-back node with fictitious density 0,
// which is experienced by the partner fluid
BounceBack<T, DESCRIPTOR> bounceBackRho0( 0. );

std::vector<T> rho0;
rho0.push_back( 1 );
rho0.push_back( 1 );
PsiEqualsRho<T,T> interactionPotential;
ShanChenForcedGenerator2D<T,DESCRIPTOR> coupling( G,rho0,interactionPotential );

sLatticeOne.addLatticeCoupling( coupling, sLatticeTwo );

prepareLattice( sLatticeOne, sLatticeTwo, bulkDynamics1, bulkDynamics2,
bounceBackRho0, bounceBackRho1, superGeometry );

// === 4th Step: Main Loop with Timer ===
int iT = 0;
clout << “starting simulation…” << endl;
Timer<T> timer( maxIter, superGeometry.getStatistics().getNvoxel() );
timer.start();

for ( iT=0; iT<maxIter; ++iT ) {

// === 5th Step: Definition of Initial and Boundary Conditions ===
setBoundaryValues( sLatticeOne, sLatticeTwo, force, iT, superGeometry );

// === 6th Step: Collide and Stream Execution ===
sLatticeOne.collideAndStream();
sLatticeTwo.collideAndStream();

sLatticeOne.communicate();
sLatticeTwo.communicate();

sLatticeOne.executeCoupling();
//sLatticeTwo.executeCoupling();

// === 7th Step: Computation and Output of the Results ===
getResults( sLatticeTwo, sLatticeOne, iT, superGeometry, timer );
}

timer.stop();
timer.printSummary();
}

Thanks

[Gloriousface]

Hello mathias，

I’m trying to speed the oil drop. The code is as follows:

sLatticeOne.defineUbouzidi（superGeometry，5，poiseuilleU ）;
sLatticeTwo.defineUbouzidi（superGeometry，5，poiseuilleU ）;

Program output error reported as
class old::SuperLattice2D<double,old::descriptors::D2Q9<old::descriptors::VELOCITY,olb::descriptors::FORCE,olb::descriptors::EXTERNAL_FORCE,olb::descriptor::OMEGA> > has no member named “defineUBouzidi”

Could you tell me if defineubouzidi cannot be used in this model?

Best
Gloriousface

[Gloriousface]

Dear mathias，

Thank you for your reply.

Best
Gloriousface

[Gloriousface]

Dear mathias，

Thank you for your reply.I tried to set the velocity of component 1 (water) at the entrance with setlocalVelocityboundary, but no flow occurred. Do I need to set a velocity boundary for component 2 (oil), such as setbouzidiVelocityboundary.

Best
Gloriousface

[Author]

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