From 94d3e79a8617f88dc0219cfdeedfa3147833719d Mon Sep 17 00:00:00 2001 From: Adrian Kummerlaender Date: Mon, 24 Jun 2019 14:43:36 +0200 Subject: Initialize at openlb-1-3 --- examples/laminar/poiseuille2d/Makefile | 105 +++++ examples/laminar/poiseuille2d/definitions.mk | 30 ++ examples/laminar/poiseuille2d/launcher2d.sh | 2 + examples/laminar/poiseuille2d/module.mk | 29 ++ examples/laminar/poiseuille2d/poiseuille2d.cpp | 516 +++++++++++++++++++++++++ 5 files changed, 682 insertions(+) create mode 100644 examples/laminar/poiseuille2d/Makefile create mode 100644 examples/laminar/poiseuille2d/definitions.mk create mode 100755 examples/laminar/poiseuille2d/launcher2d.sh create mode 100644 examples/laminar/poiseuille2d/module.mk create mode 100644 examples/laminar/poiseuille2d/poiseuille2d.cpp (limited to 'examples/laminar/poiseuille2d') diff --git a/examples/laminar/poiseuille2d/Makefile b/examples/laminar/poiseuille2d/Makefile new file mode 100644 index 0000000..a953954 --- /dev/null +++ b/examples/laminar/poiseuille2d/Makefile @@ -0,0 +1,105 @@ +# This file is part of the OpenLB library +# +# Copyright (C) 2007 Mathias Krause +# E-mail contact: info@openlb.net +# The most recent release of OpenLB can be downloaded at +# +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public +# License along with this program; if not, write to the Free +# Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +# Boston, MA 02110-1301, USA. + +########################################################################### +## definitions + +include definitions.mk + +include $(ROOT)/global.mk + +OBJECTS := $(foreach file, $(SRC), $(PWD)/$(file:.cpp=.o)) +DEPS := $(foreach file, $(SRC), $(PWD)/$(file:.cpp=.d)) + +########################################################################### +## all + +all : depend compile link + + +########################################################################### +## dependencies + +depend : $(DEPS) + +$(PWD)/%.d : %.cpp + @echo Create dependencies for $< + @$(SHELL) -ec '$(CXX) -M $(CXXFLAGS) $(IDIR) $< \ + | sed -e "s!$*\.o!$(PWD)\/$*\.o!1" > .tmpfile; \ + cp -f .tmpfile $@;' + +########################################################################### +## compile + +compile : $(OBJECTS) + +$(PWD)/%.o: %.cpp + @echo Compile $< + $(CXX) $(CXXFLAGS) $(IDIR) -c $< -o $@ + +########################################################################### +## clean + +clean : cleanrub cleanobj cleandep + +cleanrub: + @echo Clean rubbish files + @rm -f *~ core .tmpfile tmp/*.* $(OUTPUT) + @rm -f tmp/vtkData/*.* tmp/vtkData/data/*.* tmp/imageData/*.* tmp/gnuplotData/*.* tmp/gnuplotData/data/*.* + +cleanobj: + @echo Clean object files + @rm -f $(OBJECTS) + +cleandep: + @echo Clean dependencies files + @rm -f $(DEPS) + +cleanbuild: + @cd $(ROOT); \ + $(MAKE) cleanlib; + +########################################################################### +## update lib + +$(ROOT)/$(LIBDIR)/lib$(LIB).a : + @cd $(ROOT); \ + $(MAKE) all + +########################################################################### +## link + +link: $(OUTPUT) + +$(OUTPUT): $(OBJECTS) $(ROOT)/$(LIBDIR)/lib$(LIB).a + @echo Link $@ + $(CXX) $(foreach file, $(SRC), $(file:.cpp=.o)) $(LDFLAGS) -L$(ROOT)/$(LIBDIR) -l$(LIB) -lz -o $@ + +########################################################################### +## include dependencies + +ifneq "$(strip $(wildcard *.d))" "" + include $(foreach file,$(DEPS),$(file)) +endif + +########################################################################### +########################################################################### diff --git a/examples/laminar/poiseuille2d/definitions.mk b/examples/laminar/poiseuille2d/definitions.mk new file mode 100644 index 0000000..632d078 --- /dev/null +++ b/examples/laminar/poiseuille2d/definitions.mk @@ -0,0 +1,30 @@ +# This file is part of the OpenLB library +# +# Copyright (C) 2007 Mathias Krause +# E-mail contact: info@openlb.net +# The most recent release of OpenLB can be downloaded at +# +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public +# License along with this program; if not, write to the Free +# Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +# Boston, MA 02110-1301, USA. + + +########################################################################### +########################################################################### +## DEFINITIONS TO BE CHANGED + +ROOT := ../../.. +SRC := poiseuille2d.cpp +OUTPUT := poiseuille2d diff --git a/examples/laminar/poiseuille2d/launcher2d.sh b/examples/laminar/poiseuille2d/launcher2d.sh new file mode 100755 index 0000000..03f7249 --- /dev/null +++ b/examples/laminar/poiseuille2d/launcher2d.sh @@ -0,0 +1,2 @@ +#!/bin/bash +mpirun -np 4 poiseuille2d 50 0 4 diff --git a/examples/laminar/poiseuille2d/module.mk b/examples/laminar/poiseuille2d/module.mk new file mode 100644 index 0000000..1190482 --- /dev/null +++ b/examples/laminar/poiseuille2d/module.mk @@ -0,0 +1,29 @@ +# This file is part of the OpenLB library +# +# Copyright (C) 2017 Markus Mohrhard +# E-mail contact: info@openlb.net +# The most recent release of OpenLB can be downloaded at +# +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public +# License along with this program; if not, write to the Free +# Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +# Boston, MA 02110-1301, USA. + +current_dir := $(dir $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))) + +include global.mk +include rules.mk +include $(addsuffix definitions.mk, $(current_dir)) + +$(eval $(call sample,$(current_dir)$(OUTPUT),$(addprefix $(current_dir), $(SRC)))) diff --git a/examples/laminar/poiseuille2d/poiseuille2d.cpp b/examples/laminar/poiseuille2d/poiseuille2d.cpp new file mode 100644 index 0000000..a57fedd --- /dev/null +++ b/examples/laminar/poiseuille2d/poiseuille2d.cpp @@ -0,0 +1,516 @@ +/* Lattice Boltzmann sample, written in C++, using the OpenLB + * library + * + * Copyright (C) 2007, 2012 Jonas Latt, Mathias J. Krause + * Vojtech Cvrcek, Peter Weisbrod + * E-mail contact: info@openlb.net + * The most recent release of OpenLB can be downloaded at + * + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the Free + * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +/* poiseuille2d.cpp: + * This example examines a 2D Poseuille flow + * It illustrates the computation of error norms. + */ + + +#include "olb2D.h" +#include "olb2D.hh" // use only generic version! +#include +#include +#include +#include +#include + +using namespace olb; +using namespace olb::descriptors; +using namespace olb::graphics; +using namespace std; + +typedef double T; + +//#define MRT +#ifdef MRT +#define DESCRIPTOR ForcedMRTD2Q9Descriptor +#else +#define DESCRIPTOR D2Q9 +#endif + +typedef enum {forced, nonForced} FlowType; + +typedef enum {bounceBack, local, interpolated, freeSlip, partialSlip} BoundaryType; + + +// Parameters for the simulation setup +FlowType flowType = forced; +BoundaryType boundaryType = interpolated; +const T lx = 2.; // length of the channel +const T ly = 1.; // height of the channel +int N = 50; // resolution of the model +const T Re = 10.; // Reynolds number +const T maxPhysT = 20.; // max. simulation time in s, SI unit +const T physInterval = 0.25; // interval for the convergence check in s +const T residuum = 1e-5; // residuum for the convergence check +const T tuner = 0.99; // for partialSlip only: 0->bounceBack, 1->freeSlip + + +// Stores geometry information in form of material numbers +void prepareGeometry( UnitConverter const& converter, + SuperGeometry2D& superGeometry ) { + + OstreamManager clout( std::cout,"prepareGeometry" ); + clout << "Prepare Geometry ..." << std::endl; + + superGeometry.rename( 0,2 ); + + superGeometry.rename( 2,1,1,1 ); + + if (flowType == nonForced) { + Vector extend; + Vector origin; + T physSpacing = converter.getPhysDeltaX(); + + // Set material number for inflow + extend[1] = ly; + extend[0] = physSpacing / 2; + origin[0] -= physSpacing / 4; + IndicatorCuboid2D inflow( extend, origin ); + superGeometry.rename( 2,3,1,inflow ); + + // Set material number for outflow + origin[0] = lx - physSpacing / 4; + IndicatorCuboid2D outflow( extend, origin ); + superGeometry.rename( 2,4,1,outflow ); + } + + // 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; +} + +// Set up the geometry of the simulation +void prepareLattice( UnitConverter const& converter, + SuperLattice2D& sLattice, + Dynamics& bulkDynamics, + sOnLatticeBoundaryCondition2D& sBoundaryCondition, + SuperGeometry2D& superGeometry ) { + + OstreamManager clout( std::cout,"prepareLattice" ); + clout << "Prepare Lattice ..." << std::endl; + + const T omega = converter.getLatticeRelaxationFrequency(); + + // Material=0 -->do nothing + sLattice.defineDynamics( superGeometry, 0, &instances::getNoDynamics() ); + + // Material=1 -->bulk dynamics + sLattice.defineDynamics( superGeometry, 1, &bulkDynamics ); + + if (boundaryType == bounceBack) { + sLattice.defineDynamics( superGeometry, 2, &instances::getBounceBack() ); + } else if (boundaryType == freeSlip) { + sLattice.defineDynamics(superGeometry, 2, &instances::getNoDynamics()); + sBoundaryCondition.addSlipBoundary( superGeometry, 2 ); + } else if (boundaryType == partialSlip) { + sLattice.defineDynamics(superGeometry, 2, &instances::getNoDynamics()); + sBoundaryCondition.addPartialSlipBoundary(tuner, superGeometry, 2 ); + } else { + sLattice.defineDynamics( superGeometry, 2, &bulkDynamics ); + sBoundaryCondition.addVelocityBoundary( superGeometry, 2, omega ); + } + + if (flowType == nonForced) { + // Material=3 -->bulk dynamics + sLattice.defineDynamics( superGeometry, 3, &bulkDynamics ); + + // Material=4 -->bulk dynamics + sLattice.defineDynamics( superGeometry, 4, &bulkDynamics ); + + sBoundaryCondition.addVelocityBoundary( superGeometry, 3, omega ); + sBoundaryCondition.addPressureBoundary( superGeometry, 4, omega ); + } + + // Initial conditions + T Lx = converter.getLatticeLength( lx ); + T Ly = converter.getLatticeLength( ly ); + + if (flowType == forced) { + std::vector poiseuilleForce( 2,T() ); + poiseuilleForce[0] = 8.*converter.getLatticeViscosity()*converter.getCharLatticeVelocity() / ( Ly*Ly ); + AnalyticalConst2D force( poiseuilleForce ); + + // Initialize force + sLattice.defineField(superGeometry, 1, force); + sLattice.defineField(superGeometry, 2, force); + } else { + T p0 =8.*converter.getLatticeViscosity()*converter.getCharLatticeVelocity()*Lx/( Ly*Ly ); + AnalyticalLinear2D rho( -p0/lx*invCs2(), 0 , p0*invCs2()+1 ); + + T maxVelocity = converter.getCharLatticeVelocity(); + T distance2Wall = converter.getConversionFactorLength(); + Poiseuille2D u( superGeometry, 3, maxVelocity, distance2Wall ); + + // Initialize all values of distribution functions to their local equilibrium + sLattice.defineRhoU( superGeometry, 1, rho, u ); + sLattice.iniEquilibrium( superGeometry, 1, rho, u ); + sLattice.defineRhoU( superGeometry, 2, rho, u ); + sLattice.iniEquilibrium( superGeometry, 2, rho, u ); + sLattice.defineRhoU( superGeometry, 3, rho, u ); + sLattice.iniEquilibrium( superGeometry, 3, rho, u ); + sLattice.defineRhoU( superGeometry, 4, rho, u ); + sLattice.iniEquilibrium( superGeometry, 4, rho, u ); + } + + // Make the lattice ready for simulation + sLattice.initialize(); + + clout << "Prepare Lattice ... OK" << std::endl; +} + +// Compute error norms +void error( SuperGeometry2D& superGeometry, + SuperLattice2D& sLattice, + UnitConverter const& converter, + Dynamics& bulkDynamics ) { + + OstreamManager clout( std::cout,"error" ); + + int tmp[]= { }; + T result[2]= { }; + + // velocity error + const T maxVelocity = converter.getCharPhysVelocity(); + const T radius = ly/2.; + std::vector axisPoint( 2,T() ); + axisPoint[0] = lx/2.; + axisPoint[1] = ly/2.; + std::vector axisDirection( 2,T() ); + axisDirection[0] = 1; + axisDirection[1] = 0; + Poiseuille2D uSol( axisPoint, axisDirection, maxVelocity, radius ); + SuperLatticePhysVelocity2D u( sLattice,converter ); + auto indicatorF = superGeometry.getMaterialIndicator(1); + + SuperAbsoluteErrorL1Norm2D absVelocityErrorNormL1(u, uSol, indicatorF); + absVelocityErrorNormL1(result, tmp); + clout << "velocity-L1-error(abs)=" << result[0]; + SuperRelativeErrorL1Norm2D relVelocityErrorNormL1(u, uSol, indicatorF); + relVelocityErrorNormL1(result, tmp); + clout << "; velocity-L1-error(rel)=" << result[0] << std::endl; + + SuperAbsoluteErrorL2Norm2D absVelocityErrorNormL2(u, uSol, indicatorF); + absVelocityErrorNormL2(result, tmp); + clout << "velocity-L2-error(abs)=" << result[0]; + SuperRelativeErrorL2Norm2D relVelocityErrorNormL2(u, uSol, indicatorF); + relVelocityErrorNormL2(result, tmp); + clout << "; velocity-L2-error(rel)=" << result[0] << std::endl; + + SuperAbsoluteErrorLinfNorm2D absVelocityErrorNormLinf(u, uSol, indicatorF); + absVelocityErrorNormLinf(result, tmp); + clout << "velocity-Linf-error(abs)=" << result[0]; + SuperRelativeErrorLinfNorm2D relVelocityErrorNormLinf(u, uSol, indicatorF); + relVelocityErrorNormLinf(result, tmp); + clout << "; velocity-Linf-error(rel)=" << result[0] << std::endl; + + // strainRate error + PoiseuilleStrainRate2D sSol( converter, ly ); + SuperLatticePhysStrainRate2D s( sLattice,converter ); + + SuperAbsoluteErrorL1Norm2D absStrainRateErrorNormL1(s, sSol, indicatorF); + absStrainRateErrorNormL1(result, tmp); + clout << "strainRate-L1-error(abs)=" << result[0]; + SuperRelativeErrorL1Norm2D relStrainRateErrorNormL1(s, sSol, indicatorF); + relStrainRateErrorNormL1(result, tmp); + clout << "; strainRate-L1-error(rel)=" << result[0] << std::endl; + + SuperAbsoluteErrorL2Norm2D absStrainRateErrorNormL2(s, sSol, indicatorF); + absStrainRateErrorNormL2(result, tmp); + clout << "strainRate-L2-error(abs)=" << result[0]; + SuperRelativeErrorL2Norm2D relStrainRateErrorNormL2(s, sSol, indicatorF); + relStrainRateErrorNormL2(result, tmp); + clout << "; strainRate-L2-error(rel)=" << result[0] << std::endl; + + SuperAbsoluteErrorLinfNorm2D absStrainRateErrorNormLinf(s, sSol, indicatorF); + absStrainRateErrorNormLinf(result, tmp); + clout << "strainRate-Linf-error(abs)=" << result[0]; + SuperRelativeErrorLinfNorm2D relStrainRateErrorNormLinf(s, sSol, indicatorF); + relStrainRateErrorNormLinf(result, tmp); + clout << "; strainRate-Linf-error(rel)=" << result[0] << std::endl; + + if (flowType == nonForced) { + // pressure error + int Lx = converter.getLatticeLength( lx ); + int Ly = converter.getLatticeLength( ly ); + T p0 = 8.*converter.getLatticeViscosity()*converter.getCharLatticeVelocity()*Lx/T( Ly*Ly ); + AnalyticalLinear2D pressureSol( -converter.getPhysPressure( p0 )/lx , 0 , converter.getPhysPressure( p0 ) ); + SuperLatticePhysPressure2D pressure( sLattice,converter ); + + SuperAbsoluteErrorL1Norm2D absPressureErrorNormL1(pressure, pressureSol, indicatorF); + absPressureErrorNormL1(result, tmp); + clout << "pressure-L1-error(abs)=" << result[0]; + SuperRelativeErrorL1Norm2D relPressureErrorNormL1(pressure, pressureSol, indicatorF); + relPressureErrorNormL1(result, tmp); + clout << "; pressure-L1-error(rel)=" << result[0] << std::endl; + + SuperAbsoluteErrorL2Norm2D absPressureErrorNormL2(pressure, pressureSol, indicatorF); + absPressureErrorNormL2(result, tmp); + clout << "pressure-L2-error(abs)=" << result[0]; + SuperRelativeErrorL2Norm2D relPressureErrorNormL2(pressure, pressureSol, indicatorF); + relPressureErrorNormL2(result, tmp); + clout << "; pressure-L2-error(rel)=" << result[0] << std::endl; + + SuperAbsoluteErrorLinfNorm2D absPressureErrorNormLinf(pressure, pressureSol, indicatorF); + absPressureErrorNormLinf(result, tmp); + clout << "pressure-Linf-error(abs)=" << result[0]; + SuperRelativeErrorLinfNorm2D relPressureErrorNormLinf(pressure, pressureSol, indicatorF); + relPressureErrorNormLinf(result, tmp); + clout << "; pressure-Linf-error(rel)=" << result[0] << std::endl; + } +} + +// Output to console and files +void getResults( SuperLattice2D& sLattice, Dynamics& bulkDynamics, + UnitConverter const& converter, int iT, + SuperGeometry2D& superGeometry, Timer& timer, bool hasConverged ) { + + OstreamManager clout( std::cout,"getResults" ); + + SuperVTMwriter2D vtmWriter( "forcedPoiseuille2d" ); + SuperLatticePhysVelocity2D velocity( sLattice, converter ); + SuperLatticePhysPressure2D pressure( sLattice, converter ); + vtmWriter.addFunctor( velocity ); + vtmWriter.addFunctor( pressure ); + + const int vtmIter = converter.getLatticeTime( maxPhysT/20. ); + const int statIter = converter.getLatticeTime( maxPhysT/20. ); + + if ( iT==0 ) { + // Writes the geometry, cuboid no. and rank no. as vti file for visualization + SuperLatticeGeometry2D geometry( sLattice, superGeometry ); + SuperLatticeCuboid2D cuboid( sLattice ); + SuperLatticeRank2D rank( sLattice ); + superGeometry.rename( 0,2 ); + vtmWriter.write( geometry ); + vtmWriter.write( cuboid ); + vtmWriter.write( rank ); + + vtmWriter.createMasterFile(); + } + + // Writes the vtm files and profile text file + if ( iT%vtmIter==0 || hasConverged ) { + vtmWriter.write( iT ); + + SuperEuklidNorm2D normVel( velocity ); + BlockReduction2D2D planeReduction( normVel, 600, BlockDataSyncMode::ReduceOnly ); + // write output as JPEG + heatmap::write(planeReduction, iT); + } + + if ( hasConverged ) { + Gnuplot gplot( "centerVelocity" ); + T Ly = converter.getLatticeLength( ly ); + for ( int iY=0; iY<=Ly; ++iY ) { + T dx = 1. / T(converter.getResolution()); + const T maxVelocity = converter.getPhysVelocity( converter.getCharLatticeVelocity() ); + T point[2]= {T(),T()}; + point[0] = lx/2.; + point[1] = ( T )iY/Ly; + const T radius = ly/2.; + std::vector axisPoint( 2,T() ); + axisPoint[0] = lx/2.; + axisPoint[1] = ly/2.; + std::vector axisDirection( 2,T() ); + axisDirection[0] = 1; + axisDirection[1] = 0; + Poiseuille2D uSol( axisPoint, axisDirection, maxVelocity, radius ); + T analytical[2] = {T(),T()}; + uSol( analytical,point ); + SuperLatticePhysVelocity2D velocity( sLattice, converter ); + AnalyticalFfromSuperF2D intpolateVelocity( velocity, true ); + T numerical[2] = {T(),T()}; + intpolateVelocity( numerical,point ); + gplot.setData( iY*dx, {analytical[0],numerical[0]}, {"analytical","numerical"} ); + } + // Create PNG file + gplot.writePNG(); + } + + // Writes output on the console + if ( iT%statIter==0 || hasConverged ) { + // Timer console output + timer.update( iT ); + timer.printStep(); + + // Lattice statistics console output + sLattice.getStatistics().print( iT,converter.getPhysTime( iT ) ); + + // Error norms + error( superGeometry, sLattice, converter, bulkDynamics ); + } +} + +int main( int argc, char* argv[] ) { + + // === 1st Step: Initialization === + olbInit( &argc, &argv ); + singleton::directories().setOutputDir( "./tmp/" ); + OstreamManager clout( std::cout,"main" ); + + if (argc > 1) { + if (argv[1][0]=='-'&&argv[1][1]=='h') { + OstreamManager clout( std::cout,"help" ); + clout<<"Usage: program [Resolution] [FlowType] [BoundaryType]"< 1) { + N = atoi(argv[1]); + if (N < 1) { + std::cerr << "Fluid domain is too small" << std::endl; + return 1; + } + } + + if (argc > 2) { + int flowTypeNumber = atoi(argv[2]); + if (flowTypeNumber < 0 || flowTypeNumber > (int)nonForced) { + std::cerr << "Unknown fluid flow type" << std::endl; + return 2; + } + flowType = (FlowType) flowTypeNumber; + } + + if (argc > 3) { + int boundaryTypeNumber = atoi(argv[3]); + if (boundaryTypeNumber < 0 || boundaryTypeNumber > (int) partialSlip) { + std::cerr << "Unknown boundary type" << std::endl; + return 3; + } + boundaryType = (BoundaryType) boundaryTypeNumber; + } + + UnitConverterFromResolutionAndRelaxationTime const converter( + int {N}, // resolution: number of voxels per charPhysL + (T) 0.8, // latticeRelaxationTime: relaxation time, have to be greater than 0.5! + (T) 1, // charPhysLength: reference length of simulation geometry + (T) 1, // charPhysVelocity: maximal/highest expected velocity during simulation in __m / s__ + (T) 1./Re, // physViscosity: physical kinematic viscosity in __m^2 / s__ + (T) 1.0 // physDensity: physical density in __kg / m^3__ + ); + // Prints the converter log as console output + converter.print(); + // Writes the converter log in a file + converter.write("forcedPoiseuille2d"); + + + // === 2nd Step: Prepare Geometry === + Vector extend( lx, ly ); + Vector origin; + IndicatorCuboid2D cuboid( extend, origin ); + + // Instantiation of a cuboidGeometry with weights +#ifdef PARALLEL_MODE_MPI + const int noOfCuboids = singleton::mpi().getSize(); +#else + const int noOfCuboids = 1; +#endif + CuboidGeometry2D cuboidGeometry( cuboid, converter.getConversionFactorLength(), noOfCuboids ); + + + if (flowType == forced) { + // Periodic boundaries in x-direction + cuboidGeometry.setPeriodicity( true, false ); + } + + // Instantiation of a loadBalancer + HeuristicLoadBalancer loadBalancer( cuboidGeometry ); + + // Instantiation of a superGeometry + SuperGeometry2D superGeometry( cuboidGeometry, loadBalancer, 2 ); + + prepareGeometry( converter, superGeometry ); + + // === 3rd Step: Prepare Lattice === + SuperLattice2D sLattice( superGeometry ); + + Dynamics* bulkDynamics; + +#if defined(MRT) + if (flowType == forced) { + bulkDynamics = new ForcedMRTdynamics( converter.getLatticeRelaxationFrequency(), instances::getBulkMomenta() ); + } else { + bulkDynamics = new MRTdynamics( converter.getLatticeRelaxationFrequency(), instances::getBulkMomenta() ); + } +#else + if (flowType == forced) { + bulkDynamics = new ForcedBGKdynamics( converter.getLatticeRelaxationFrequency(), instances::getBulkMomenta() ); + } else { + bulkDynamics = new BGKdynamics( converter.getLatticeRelaxationFrequency(), instances::getBulkMomenta() ); + } +#endif + + + // choose between local and non-local boundary condition + sOnLatticeBoundaryCondition2D sBoundaryCondition( sLattice ); + if (boundaryType == local) { + createLocalBoundaryCondition2D (sBoundaryCondition); + } else { + createInterpBoundaryCondition2D ( sBoundaryCondition ); + } + + prepareLattice( converter, sLattice, *bulkDynamics, sBoundaryCondition, superGeometry ); + + // === 4th Step: Main Loop with Timer === + clout << "starting simulation..." << endl; + Timer timer( converter.getLatticeTime( maxPhysT ), superGeometry.getStatistics().getNvoxel() ); + util::ValueTracer converge( converter.getLatticeTime( physInterval ), residuum ); + timer.start(); + + for ( int iT = 0; iT < converter.getLatticeTime( maxPhysT ); ++iT ) { + if ( converge.hasConverged() ) { + clout << "Simulation converged." << endl; + getResults( sLattice, *bulkDynamics, converter, iT, superGeometry, timer, converge.hasConverged() ); + + break; + } + + // === 5th Step: Definition of Initial and Boundary Conditions === + // in this application no boundary conditions have to be adjusted + + // === 6th Step: Collide and Stream Execution === + sLattice.collideAndStream(); + + // === 7th Step: Computation and Output of the Results === + getResults( sLattice, *bulkDynamics, converter, iT, superGeometry, timer, converge.hasConverged() ); + converge.takeValue( sLattice.getStatistics().getAverageEnergy(), true ); + } + + timer.stop(); + timer.printSummary(); +} -- cgit v1.2.3