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 --- .../phaseSeparation2d/phaseSeparation2d.cpp | 216 +++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 examples/multiComponent/phaseSeparation2d/phaseSeparation2d.cpp (limited to 'examples/multiComponent/phaseSeparation2d/phaseSeparation2d.cpp') diff --git a/examples/multiComponent/phaseSeparation2d/phaseSeparation2d.cpp b/examples/multiComponent/phaseSeparation2d/phaseSeparation2d.cpp new file mode 100644 index 0000000..c4b1839 --- /dev/null +++ b/examples/multiComponent/phaseSeparation2d/phaseSeparation2d.cpp @@ -0,0 +1,216 @@ +/* This file is part of the OpenLB library + * + * Copyright (C) 2014 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. +*/ + +/* phaseSeparation2d.cpp: + * In this example the simulation is initialized with a given + * density plus a small random number all over the domain. This + * condition is unstable and leads to liquid-vapor phase separation. + * Boundaries are assumed to be periodic. This example shows the + * usage of multiphase flow. + */ + + +#include "olb2D.h" +#include "olb2D.hh" // use only generic version! +#include +#include + +using namespace olb; +using namespace olb::descriptors; +using namespace olb::graphics; +using namespace std; + +typedef double T; +#define DESCRIPTOR ShanChenDynOmegaForcedD2Q9Descriptor + + +// Parameters for the simulation setup +const int maxIter = 10000; +const int nx = 201; +const int ny = 201; + + +// Stores geometry information in form of material numbers +void prepareGeometry( SuperGeometry2D& superGeometry ) { + + OstreamManager clout( std::cout,"prepareGeometry" ); + clout << "Prepare Geometry ..." << std::endl; + + // Sets material number for fluid + superGeometry.rename( 0,1 ); + + // 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( SuperLattice2D& sLattice, + Dynamics& bulkDynamics1, + SuperGeometry2D& superGeometry ) { + + // Material=1 -->bulk dynamics + sLattice.defineDynamics( superGeometry, 1, &bulkDynamics1 ); + + // Initial conditions + AnalyticalConst2D noise( 2. ); + std::vector v( 2,T() ); + AnalyticalConst2D zeroVelocity( v ); + AnalyticalConst2D oldRho( 199. ); + AnalyticalRandom2D random; + AnalyticalIdentity2D newRho( random*noise+oldRho ); + + // Initialize all values of distribution functions to their local equilibrium + sLattice.defineRhoU( superGeometry, 1, newRho, zeroVelocity ); + sLattice.iniEquilibrium( superGeometry, 1, newRho, zeroVelocity ); + + // Make the lattice ready for simulation + sLattice.initialize(); +} + +// Output to console and files +void getResults( SuperLattice2D& sLattice, int iT, + SuperGeometry2D& superGeometry, Timer& timer ) { + + OstreamManager clout( std::cout,"getResults" ); + + SuperVTMwriter2D vtmWriter( "phaseSeparation2d" ); + SuperLatticeVelocity2D velocity( sLattice ); + SuperLatticeDensity2D density( sLattice ); + vtmWriter.addFunctor( velocity ); + vtmWriter.addFunctor( density ); + + const int vtkIter = 20; + const int statIter = 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 ); + vtmWriter.write( geometry ); + vtmWriter.write( cuboid ); + vtmWriter.write( rank ); + + vtmWriter.createMasterFile(); + } + + // Writes the vtk files + if ( iT%vtkIter==0 ) { + clout << "Writing VTK and JPEG..." << std::endl; + vtmWriter.write( iT ); + + BlockReduction2D2D planeReduction( density, 600, BlockDataSyncMode::ReduceOnly ); + // write output as JPEG + heatmap::write(planeReduction, iT); + } + + // Writes output on the console + if ( iT%statIter==0 ) { + // Timer console output + timer.update( iT ); + timer.printStep(); + + // Lattice statistics console output + sLattice.getStatistics().print( iT,iT ); + } +} + +int main( int argc, char *argv[] ) { + + // === 1st Step: Initialization === + olbInit( &argc, &argv ); + singleton::directories().setOutputDir( "./tmp/" ); + OstreamManager clout( std::cout,"main" ); + // display messages from every single mpi process + //clout.setMultiOutput(true); + + const T omega1 = 1.0; + const T G = -120.; + + // === 2rd Step: Prepare Geometry === + + // Instantiation of a cuboidGeometry with weights +#ifdef PARALLEL_MODE_MPI + const int noOfCuboids = singleton::mpi().getSize(); +#else + const int noOfCuboids = 1; +#endif + CuboidGeometry2D cuboidGeometry( 0, 0, 1, nx, ny, noOfCuboids ); + + // Periodic boundaries in x- and y-direction + cuboidGeometry.setPeriodicity( true, true ); + + // Instantiation of a loadBalancer + HeuristicLoadBalancer loadBalancer( cuboidGeometry ); + + // Instantiation of a superGeometry + SuperGeometry2D superGeometry( cuboidGeometry,loadBalancer,2 ); + + prepareGeometry( superGeometry ); + + // === 3rd Step: Prepare Lattice === + SuperLattice2D sLattice( superGeometry ); + + ForcedShanChenBGKdynamics bulkDynamics1 ( + omega1, instances::getExternalVelocityMomenta() ); + + std::vector rho0; + rho0.push_back( 1 ); + rho0.push_back( 1 ); + ShanChen94 interactionPotential; + ShanChenForcedSingleComponentGenerator2D coupling( G,rho0,interactionPotential ); + + sLattice.addLatticeCoupling( coupling, sLattice ); + + prepareLattice( sLattice, bulkDynamics1, superGeometry ); + + // === 4th Step: Main Loop === + int iT = 0; + clout << "starting simulation..." << endl; + Timer timer( maxIter, superGeometry.getStatistics().getNvoxel() ); + timer.start(); + + for ( iT = 0; iT < maxIter; ++iT ) { + + // === 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(); + sLattice.communicate(); + sLattice.executeCoupling(); + + // === 7th Step: Computation and Output of the Results === + getResults( sLattice, iT, superGeometry, timer ); + } + + timer.stop(); + timer.printSummary(); +} -- cgit v1.2.3