From e7b4bdc064da4340f415ac1e7ddcb6e260d61b0f Mon Sep 17 00:00:00 2001 From: Adrian Kummerlaender Date: Mon, 4 Feb 2019 21:30:45 +0100 Subject: Restructure refined cylinder2d example folders --- apps/adrian/cylinder2d/cylinder2d.cpp | 339 ---------------------------------- 1 file changed, 339 deletions(-) delete mode 100644 apps/adrian/cylinder2d/cylinder2d.cpp (limited to 'apps/adrian/cylinder2d/cylinder2d.cpp') diff --git a/apps/adrian/cylinder2d/cylinder2d.cpp b/apps/adrian/cylinder2d/cylinder2d.cpp deleted file mode 100644 index 5b67408..0000000 --- a/apps/adrian/cylinder2d/cylinder2d.cpp +++ /dev/null @@ -1,339 +0,0 @@ -/* - * Lattice Boltzmann grid refinement sample, written in C++, - * using the OpenLB library - * - * Copyright (C) 2019 Adrian Kummerländer - * 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. - */ - -#include "olb2D.h" -#ifndef OLB_PRECOMPILED -#include "olb2D.hh" -#endif - -#include - -using namespace olb; - -typedef double T; - -#define DESCRIPTOR descriptors::D2Q9Descriptor - -/// Setup geometry relative to cylinder diameter as defined by [SchaeferTurek96] -const T cylinderD = 0.1; -const int N = 10; // resolution of the cylinder -const T deltaR = cylinderD / N; // coarse lattice spacing -const T lx = 22*cylinderD + deltaR; // length of the channel -const T ly = 4.1*cylinderD + deltaR; // height of the channel -const T cylinderX = 2*cylinderD; -const T cylinderY = 2*cylinderD + deltaR/2; - -const T Re = 100.; // Reynolds number -const T tau = 0.51; // relaxation time -const T maxPhysT = 16.; // max. simulation time in s, SI unit - -const Characteristics PhysCharacteristics( - 0.1, // char. phys. length - 1.0, // char. phys. velocity - 0.1/Re, // phsy. kinematic viscosity - 1.0); // char. phys. density - -void prepareGeometry(Grid2D& grid, Vector origin, Vector extend) -{ - OstreamManager clout(std::cout,"prepareGeometry"); - clout << "Prepare Geometry ..." << std::endl; - - auto& converter = grid.getConverter(); - auto& sGeometry = grid.getSuperGeometry(); - - sGeometry.rename(0,1); - - const T physSpacing = converter.getPhysDeltaX(); - - // Set material number for channel walls - { - const Vector wallExtend { extend[0]+physSpacing/2, physSpacing/2 }; - const Vector wallOrigin = origin - physSpacing/4; - - IndicatorCuboid2D lowerWall(wallExtend, wallOrigin); - sGeometry.rename(1,2,lowerWall); - } - { - const Vector wallExtend { extend[0]+physSpacing/2, physSpacing/2 }; - const Vector wallOrigin { origin[0]-physSpacing/4, extend[1]-physSpacing/4 }; - - IndicatorCuboid2D upperWall(wallExtend, wallOrigin); - sGeometry.rename(1,2,upperWall); - } - - // Set material number for inflow and outflow - { - const Vector inflowExtend { physSpacing/2, extend[1]+physSpacing/4 }; - const Vector inflowOrigin = origin - physSpacing/4; - - IndicatorCuboid2D inflow(inflowExtend, inflowOrigin); - sGeometry.rename(1,3,inflow); - } - { - const Vector outflowExtend { physSpacing/2, extend[1]+physSpacing/4 }; - const Vector outflowOrigin { extend[0]-physSpacing/4, origin[0]-physSpacing/4 }; - - IndicatorCuboid2D outflow(outflowExtend, outflowOrigin); - sGeometry.rename(1,4,outflow); - } - - // Set material number for vertically centered cylinder - { - const Vector cylinderOrigin = origin + Vector {cylinderX, cylinderY}; - IndicatorCircle2D obstacle(cylinderOrigin, cylinderD/2); - sGeometry.rename(1,5,obstacle); - } - - sGeometry.clean(); - sGeometry.innerClean(); - sGeometry.checkForErrors(); - - clout << "Prepare Geometry ... OK" << std::endl; -} - -void disableRefinedArea(Grid2D& coarseGrid, - RefiningGrid2D& fineGrid) -{ - auto& sGeometry = coarseGrid.getSuperGeometry(); - auto refinedOverlap = fineGrid.getRefinedOverlap(); - sGeometry.reset(*refinedOverlap); -} - -void prepareLattice(Grid2D& grid) -{ - OstreamManager clout(std::cout,"prepareLattice"); - clout << "Prepare lattice ..." << std::endl; - - auto& converter = grid.getConverter(); - auto& sGeometry = grid.getSuperGeometry(); - auto& sLattice = grid.getSuperLattice(); - - Dynamics& bulkDynamics = grid.addDynamics( - std::unique_ptr>( - new BGKdynamics( - grid.getConverter().getLatticeRelaxationFrequency(), - instances::getBulkMomenta()))); - - sOnLatticeBoundaryCondition2D& sBoundaryCondition = grid.getOnLatticeBoundaryCondition(); - createInterpBoundaryCondition2D(sBoundaryCondition); - - const T omega = converter.getLatticeRelaxationFrequency(); - - sLattice.defineDynamics(sGeometry, 0, &instances::getNoDynamics()); - sLattice.defineDynamics(sGeometry, 1, &bulkDynamics); // bulk - sLattice.defineDynamics(sGeometry, 2, &bulkDynamics); // walls - sLattice.defineDynamics(sGeometry, 3, &bulkDynamics); // inflow - sLattice.defineDynamics(sGeometry, 4, &bulkDynamics); // outflow - sLattice.defineDynamics(sGeometry, 5, &instances::getBounceBack()); // cylinder - - sBoundaryCondition.addVelocityBoundary(sGeometry, 2, omega); - sBoundaryCondition.addVelocityBoundary(sGeometry, 3, omega); - sBoundaryCondition.addPressureBoundary(sGeometry, 4, omega); - - AnalyticalConst2D rho0(1.0); - AnalyticalConst2D u0(0.0, 0.0); - - auto materials = sGeometry.getMaterialIndicator({1, 2, 3, 4}); - sLattice.defineRhoU(materials, rho0, u0); - sLattice.iniEquilibrium(materials, rho0, u0); - - sLattice.initialize(); - - clout << "Prepare lattice ... OK" << std::endl; - sGeometry.print(); -} - -void setBoundaryValues(Grid2D& grid, int iT) -{ - auto& converter = grid.getConverter(); - auto& sGeometry = grid.getSuperGeometry(); - auto& sLattice = grid.getSuperLattice(); - - const int iTmaxStart = converter.getLatticeTime(0.4*16); - const int iTupdate = 5; - - if ( iT % iTupdate == 0 && iT <= iTmaxStart ) { - PolynomialStartScale StartScale(iTmaxStart, 1); - - T iTvec[1] { T(iT) }; - T frac[1] { }; - StartScale(frac, iTvec); - - const T maxVelocity = converter.getCharLatticeVelocity() * 3./2. * frac[0]; - Poiseuille2D u(sGeometry, 3, maxVelocity, deltaR/2); - - sLattice.defineU(sGeometry, 3, u); - } -} - -void getResults(const std::string& prefix, - Grid2D& grid, - int iT) -{ - OstreamManager clout(std::cout,"getResults"); - - auto& converter = grid.getConverter(); - auto& sLattice = grid.getSuperLattice(); - auto& sGeometry = grid.getSuperGeometry(); - - SuperVTMwriter2D vtmWriter(prefix + "cylinder2d"); - SuperLatticePhysVelocity2D velocity(sLattice, converter); - SuperLatticePhysPressure2D pressure(sLattice, converter); - SuperLatticeGeometry2D geometry(sLattice, sGeometry); - SuperLatticeKnudsen2D knudsen(sLattice); - vtmWriter.addFunctor(geometry); - vtmWriter.addFunctor(velocity); - vtmWriter.addFunctor(pressure); - vtmWriter.addFunctor(knudsen); - - if (iT==0) { - vtmWriter.createMasterFile(); - } - - vtmWriter.write(iT); -} - -void takeMeasurements(Grid2D& grid) -{ - static T maxDrag = 0.0; - - OstreamManager clout(std::cout,"measurement"); - - auto& sLattice = grid.getSuperLattice(); - auto& sGeometry = grid.getSuperGeometry(); - auto& converter = grid.getConverter(); - - SuperLatticePhysPressure2D pressure(sLattice, converter); - AnalyticalFfromSuperF2D intpolatePressure(pressure, true); - SuperLatticePhysDrag2D dragF(sLattice, sGeometry, 5, converter); - - const T radiusCylinder = cylinderD/2; - - const T point1[2] { cylinderX - radiusCylinder, cylinderY }; - const T point2[2] { cylinderX + radiusCylinder, cylinderY }; - - T pressureInFrontOfCylinder, pressureBehindCylinder; - intpolatePressure(&pressureInFrontOfCylinder, point1); - intpolatePressure(&pressureBehindCylinder, point2); - - T pressureDrop = pressureInFrontOfCylinder - pressureBehindCylinder; - clout << "pressureDrop=" << pressureDrop; - - const int input[3] {}; - T drag[dragF.getTargetDim()] {}; - dragF(drag, input); - if (drag[0] > maxDrag) { - maxDrag = drag[0]; - }; - clout << "; drag=" << drag[0] << "; maxDrag: " << maxDrag << "; lift=" << drag[1] << endl; -} - -int main(int argc, char* argv[]) -{ - olbInit(&argc, &argv); - singleton::directories().setOutputDir("./tmp/"); - OstreamManager clout(std::cout,"main"); - - const Vector coarseOrigin {0.0, 0.0}; - const Vector coarseExtend {lx, ly}; - IndicatorCuboid2D coarseCuboid(coarseExtend, coarseOrigin); - - Grid2D coarseGrid( - coarseCuboid, - RelaxationTime(tau), - N, - PhysCharacteristics); - const Vector domainOrigin = coarseGrid.getSuperGeometry().getStatistics().getMinPhysR(0); - const Vector domainExtend = coarseGrid.getSuperGeometry().getStatistics().getPhysExtend(0); - - prepareGeometry(coarseGrid, domainOrigin, domainExtend); - - const auto coarseDeltaX = coarseGrid.getConverter().getPhysDeltaX(); - - const Vector fineExtend {10*cylinderD, domainExtend[1]-4*coarseDeltaX}; - const Vector fineOrigin {0.5*cylinderD, (domainExtend[1]-fineExtend[1])/2}; - - auto& fineGrid = coarseGrid.refine(fineOrigin, fineExtend); - prepareGeometry(fineGrid, domainOrigin, domainExtend); - disableRefinedArea(coarseGrid, fineGrid); - - const Vector fineExtend2 {6*cylinderD, fineGrid.getExtend()[1]-4*coarseDeltaX}; - const Vector fineOrigin2 {0.75*cylinderD, (domainExtend[1]-fineExtend2[1])/2}; - - auto& fineGrid2 = fineGrid.refine(fineOrigin2, fineExtend2); - prepareGeometry(fineGrid2, domainOrigin, domainExtend); - disableRefinedArea(fineGrid, fineGrid2); - - const Vector fineExtend3 {4*cylinderD, 2*cylinderD}; - const Vector fineOrigin3 {1*cylinderD, (domainExtend[1]-fineExtend3[1])/2}; - - auto& fineGrid3 = fineGrid2.refine(fineOrigin3, fineExtend3); - prepareGeometry(fineGrid3, domainOrigin, domainExtend); - disableRefinedArea(fineGrid2, fineGrid3); - - const Vector fineExtend4 {1.25*cylinderD, 1.25*cylinderD}; - const Vector fineOrigin4 {cylinderX - fineExtend4[0]/2, cylinderY - fineExtend4[1]/2}; - - auto& fineGrid4 = fineGrid3.refine(fineOrigin4, fineExtend4); - prepareGeometry(fineGrid4, domainOrigin, domainExtend); - disableRefinedArea(fineGrid3, fineGrid4); - - prepareLattice(coarseGrid); - prepareLattice(fineGrid); - prepareLattice(fineGrid2); - prepareLattice(fineGrid3); - prepareLattice(fineGrid4); - - clout << "Total number of active cells: " << coarseGrid.getActiveVoxelN() << endl; - clout << "Starting simulation..." << endl; - - const int statIter = coarseGrid.getConverter().getLatticeTime(0.05); - Timer timer( - coarseGrid.getConverter().getLatticeTime(maxPhysT), - coarseGrid.getSuperGeometry().getStatistics().getNvoxel()); - timer.start(); - - for (int iT = 0; iT <= coarseGrid.getConverter().getLatticeTime(maxPhysT); ++iT) { - setBoundaryValues(coarseGrid, iT); - - coarseGrid.collideAndStream(); - - if (iT%statIter == 0) { - timer.update(iT); - timer.printStep(); - - getResults("level0_", coarseGrid, iT); - getResults("level1_", fineGrid, iT); - getResults("level2_", fineGrid2, iT); - getResults("level3_", fineGrid3, iT); - getResults("level4_", fineGrid4, iT); - - takeMeasurements(fineGrid4); - } - } - - timer.stop(); - timer.printSummary(); -} -- cgit v1.2.3