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authorAdrian Kummerlaender2019-06-24 14:43:36 +0200
committerAdrian Kummerlaender2019-06-24 14:43:36 +0200
commit94d3e79a8617f88dc0219cfdeedfa3147833719d (patch)
treec1a6894679563e271f5c6ea7a17fa3462f7212a3 /examples/porousMedia/porousPoiseuille3d
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Initialize at openlb-1-3
Diffstat (limited to 'examples/porousMedia/porousPoiseuille3d')
-rw-r--r--examples/porousMedia/porousPoiseuille3d/Makefile105
-rw-r--r--examples/porousMedia/porousPoiseuille3d/definitions.mk30
-rw-r--r--examples/porousMedia/porousPoiseuille3d/module.mk29
-rw-r--r--examples/porousMedia/porousPoiseuille3d/porousPoiseuille3d.cpp484
4 files changed, 648 insertions, 0 deletions
diff --git a/examples/porousMedia/porousPoiseuille3d/Makefile b/examples/porousMedia/porousPoiseuille3d/Makefile
new file mode 100644
index 0000000..a953954
--- /dev/null
+++ b/examples/porousMedia/porousPoiseuille3d/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
+# <http://www.openlb.net/>
+#
+# 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/porousMedia/porousPoiseuille3d/definitions.mk b/examples/porousMedia/porousPoiseuille3d/definitions.mk
new file mode 100644
index 0000000..6dcc037
--- /dev/null
+++ b/examples/porousMedia/porousPoiseuille3d/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
+# <http://www.openlb.net/>
+#
+# 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 := porousPoiseuille3d.cpp
+OUTPUT := porousPoiseuille3d
diff --git a/examples/porousMedia/porousPoiseuille3d/module.mk b/examples/porousMedia/porousPoiseuille3d/module.mk
new file mode 100644
index 0000000..1190482
--- /dev/null
+++ b/examples/porousMedia/porousPoiseuille3d/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
+# <http://www.openlb.net/>
+#
+# 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/porousMedia/porousPoiseuille3d/porousPoiseuille3d.cpp b/examples/porousMedia/porousPoiseuille3d/porousPoiseuille3d.cpp
new file mode 100644
index 0000000..01a7a62
--- /dev/null
+++ b/examples/porousMedia/porousPoiseuille3d/porousPoiseuille3d.cpp
@@ -0,0 +1,484 @@
+/* Lattice Boltzmann sample, written in C++, using the OpenLB
+ * library
+ *
+ * Copyright (C) 2019 Fabian Klemens, Marc Haußmann
+ * Mathias J. Krause, Vojtech Cvrcek, Peter Weisbrod
+ * E-mail contact: info@openlb.net
+ * The most recent release of OpenLB can be downloaded at
+ * <http://www.openlb.net/>
+ *
+ * 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.
+ */
+
+/* porousPoiseuille3d.cpp:
+ * This example examines a 3D Poseuille flow with porous media.
+ * Two porous media LB methods can be used here:
+ * Spaid and Phelan (doi:10.1063/1.869392), or
+ * Guo and Zhao (doi:10.1103/PhysRevE.66.036304)
+ */
+
+
+#include "olb3D.h"
+#include "olb3D.hh"
+
+#include <vector>
+#include <cmath>
+#include <iostream>
+#include <iomanip>
+#include <fstream>
+
+using namespace olb;
+
+typedef double T;
+
+#define SPAID_PHELAN
+//#define GUO_ZHAO
+
+T epsilon = 1.;
+T K = 1e-3;
+
+#ifdef SPAID_PHELAN
+#define DESCRIPTOR descriptors::PorousD3Q19Descriptor
+#elif defined GUO_ZHAO
+#define DESCRIPTOR descriptors::GuoZhaoD3Q19Descriptor
+#endif
+
+
+// Parameters for the simulation setup
+const T length = 2.; // length of the pie
+const T diameter = 1.; // diameter of the pipe
+int N = 21; // resolution of the model
+const T physU = 1.; // physical velocity
+const T Re = 1.; // Reynolds number
+const T physRho = 1.; // physical density
+const T tau = 0.8; // lattice relaxation time
+const T maxPhysT = 20.; // max. simulation time in s, SI unit
+const T residuum = 1e-5; // residuum for the convergence check
+const T tuner = 0.97; // for partialSlip only: 0->bounceBack, 1->freeSlip
+
+// Scaled Parameters
+const T radius = diameter/2.; // radius of the pipe
+const T physInterval = 0.0125*maxPhysT; // interval for the convergence check in s
+
+
+// Stores geometry information in form of material numbers
+void prepareGeometry( UnitConverter<T,DESCRIPTOR> const& converter,
+ SuperGeometry3D<T>& superGeometry )
+{
+
+ OstreamManager clout(std::cout, "prepareGeometry");
+
+ clout << "Prepare Geometry ..." << std::endl;
+
+ Vector<T, 3> center0(-converter.getPhysDeltaX() * 0.2, radius, radius);
+ Vector<T, 3> center1(length, radius, radius);
+ IndicatorCylinder3D<T> pipe(center0, center1, radius);
+
+ superGeometry.rename(0, 2);
+
+ superGeometry.rename(2, 1, pipe);
+
+ Vector<T, 3> origin(0, radius, radius);
+ Vector<T, 3> extend = origin;
+
+ // Set material number for inflow
+ origin[0] = -converter.getPhysDeltaX() * 2;
+ extend[0] = converter.getPhysDeltaX() * 2;
+ IndicatorCylinder3D<T> inflow(origin, extend, radius);
+ superGeometry.rename(2, 3, 1, inflow);
+
+ // Set material number for outflow
+ origin[0] = length - 2 * converter.getPhysDeltaX();
+ extend[0] = length + 2 * converter.getPhysDeltaX();
+ IndicatorCylinder3D<T> outflow(extend, origin, radius);
+ 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(SuperLattice3D<T, DESCRIPTOR>& sLattice,
+ UnitConverter<T, DESCRIPTOR>const& converter,
+ Dynamics<T, DESCRIPTOR>& bulkDynamics,
+ sOnLatticeBoundaryCondition3D<T, DESCRIPTOR>& onBc,
+ sOffLatticeBoundaryCondition3D<T, DESCRIPTOR>& offBc,
+ SuperGeometry3D<T>& 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<T, DESCRIPTOR>() );
+
+ // Material=1 -->bulk dynamics
+ sLattice.defineDynamics( superGeometry, 1, &bulkDynamics );
+
+ Vector<T, 3> center0(0, radius, radius);
+ Vector<T, 3> center1(length, radius, radius);
+
+ std::vector<T> origin = { length, radius, radius};
+ std::vector<T> axis = { 1, 0, 0 };
+
+ CirclePoiseuille3D<T> poiseuilleU(origin, axis, converter.getCharLatticeVelocity(), radius);
+
+ AnalyticalConst3D<T,T> zero(0.);
+ AnalyticalConst3D<T,T> one(1.);
+
+ T nu = (tau-0.5)/3.;
+ T h = converter.getPhysDeltaX();
+#ifdef SPAID_PHELAN
+ T d = 1. - (h*h*nu*tau/K);
+ clout << "Lattice Porosity: " << d << std::endl;
+ clout << "Kmin: " << h*h*nu*tau << std::endl;
+ if (K < h*h*nu*tau) {
+ clout << "WARNING: Chosen K is too small!" << std::endl;
+ exit(1);
+ }
+#endif
+
+#ifdef SPAID_PHELAN
+ AnalyticalConst3D<T,T> porosity(d);
+ sLattice.defineField<descriptors::POROSITY>(superGeometry, 1, porosity);
+#elif defined GUO_ZHAO
+ AnalyticalConst3D<T,T> Nu(nu);
+ AnalyticalConst3D<T,T> k(K/(h*h));
+ AnalyticalConst3D<T,T> eps(epsilon);
+
+ sLattice.defineField<descriptors::EPSILON>(superGeometry, 1, eps);
+ sLattice.defineField<descriptors::NU>(superGeometry, 1, 1, Nu);
+ sLattice.defineField<descriptors::K>(superGeometry, 1, k);
+#endif
+
+ sLattice.defineDynamics(superGeometry, 2, &instances::getNoDynamics<T, DESCRIPTOR>() );
+
+ center0[0] -= 0.5*converter.getPhysDeltaX();
+ center1[0] += 0.5*converter.getPhysDeltaX();
+ IndicatorCylinder3D<T> pipe(center0, center1, radius);
+ offBc.addZeroVelocityBoundary(superGeometry, 2, pipe);
+
+ sLattice.defineDynamics( superGeometry, 2, &bulkDynamics );
+ onBc.addVelocityBoundary( superGeometry, 2, omega );
+
+ sLattice.defineDynamics(superGeometry, 3, &instances::getNoDynamics<T, DESCRIPTOR>() );
+ offBc.addVelocityBoundary(superGeometry, 3, pipe);
+ offBc.defineU(superGeometry,3,poiseuilleU);
+
+ // Material=4 -->bulk dynamics
+ sLattice.defineDynamics( superGeometry, 4, &bulkDynamics );
+ onBc.addPressureBoundary( superGeometry, 4, omega );
+
+ // Initial conditions
+ T p0 = 4. * converter.getPhysViscosity() * converter.getCharPhysVelocity() * length / (radius * radius);
+
+ p0 = converter.getLatticePressure(p0);
+ AnalyticalLinear3D<T, T> rho(-p0 / length * descriptors::invCs2<T,DESCRIPTOR>(), 0, 0, p0 * descriptors::invCs2<T,DESCRIPTOR>() + 1);
+
+ std::vector<T> velocity(3, T());
+ AnalyticalConst3D<T, T> uF(velocity);
+
+ // Initialize all values of distribution functions to their local equilibrium
+ sLattice.defineRhoU(superGeometry, 0, rho, uF);
+ sLattice.iniEquilibrium(superGeometry, 0, rho, uF);
+ sLattice.defineRhoU(superGeometry, 1, rho, poiseuilleU);
+ sLattice.iniEquilibrium(superGeometry, 1, rho, poiseuilleU);
+ sLattice.defineRhoU(superGeometry, 2, rho, poiseuilleU);
+ sLattice.iniEquilibrium(superGeometry, 2, rho, poiseuilleU);
+ sLattice.defineRhoU(superGeometry, 3, rho, poiseuilleU);
+ sLattice.iniEquilibrium(superGeometry, 3, rho, poiseuilleU);
+ sLattice.defineRhoU(superGeometry, 4, rho, poiseuilleU);
+ sLattice.iniEquilibrium(superGeometry, 4, rho, poiseuilleU);
+
+ // Make the lattice ready for simulation
+ sLattice.initialize();
+
+ clout << "Prepare Lattice ... OK" << std::endl;
+}
+
+/// Compute error norms
+void error( SuperGeometry3D<T>& superGeometry,
+ SuperLattice3D<T, DESCRIPTOR>& sLattice,
+ UnitConverter<T,DESCRIPTOR> const& converter,
+ AnalyticalF3D<T,T>& porVel) {
+
+ OstreamManager clout( std::cout,"error" );
+
+
+ int tmp[]= { };
+ T result[2]= { };
+ auto indicatorF = superGeometry.getMaterialIndicator(1);
+ SuperLatticePhysVelocity3D<T,DESCRIPTOR> u( sLattice, converter );
+
+ SuperAbsoluteErrorL1Norm3D<T> absVelocityErrorNormL1(u, porVel, indicatorF);
+ absVelocityErrorNormL1(result, tmp);
+ clout << "velocity-L1-error(abs)=" << result[0];
+ SuperRelativeErrorL1Norm3D<T> relVelocityErrorNormL1(u, porVel, indicatorF);
+ relVelocityErrorNormL1(result, tmp);
+ clout << "; velocity-L1-error(rel)=" << result[0] << std::endl;
+
+ SuperAbsoluteErrorL2Norm3D<T> absVelocityErrorNormL2(u, porVel, indicatorF);
+ absVelocityErrorNormL2(result, tmp);
+ clout << "velocity-L2-error(abs)=" << result[0];
+ SuperRelativeErrorL2Norm3D<T> relVelocityErrorNormL2(u, porVel, indicatorF);
+ relVelocityErrorNormL2(result, tmp);
+ clout << "; velocity-L2-error(rel)=" << result[0] << std::endl;
+
+ SuperAbsoluteErrorLinfNorm3D<T> absVelocityErrorNormLinf(u, porVel, indicatorF);
+ absVelocityErrorNormLinf(result, tmp);
+ clout << "velocity-Linf-error(abs)=" << result[0];
+ SuperRelativeErrorLinfNorm3D<T> relVelocityErrorNormLinf(u, porVel, indicatorF);
+ relVelocityErrorNormLinf(result, tmp);
+ clout << "; velocity-Linf-error(rel)=" << result[0] << std::endl;
+}
+
+
+// Output to console and files
+void getResults( SuperLattice3D<T,DESCRIPTOR>& sLattice, Dynamics<T, DESCRIPTOR>& bulkDynamics,
+ UnitConverter<T,DESCRIPTOR> const& converter, int iT,
+ SuperGeometry3D<T>& superGeometry, Timer<T>& timer, bool hasConverged )
+{
+
+ OstreamManager clout( std::cout,"getResults" );
+
+ SuperVTMwriter3D<T> vtmWriter( "porousPoiseuille3d" );
+ SuperLatticePhysVelocity3D<T, DESCRIPTOR> velocity( sLattice, converter );
+ SuperLatticePhysPressure3D<T, DESCRIPTOR> 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
+ SuperLatticeGeometry3D<T, DESCRIPTOR> geometry( sLattice, superGeometry );
+ SuperLatticeCuboid3D<T, DESCRIPTOR> cuboid( sLattice );
+ SuperLatticeRank3D<T, DESCRIPTOR> rank( sLattice );
+
+ 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 );
+ }
+
+
+ // 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
+ AnalyticalFfromSuperF3D<T> intpolatePressure( pressure, true );
+
+ T point1[3] = {0, radius, radius};
+ T point2[3] = {0, radius, radius};
+
+ point1[0] = length*0.5 - length*0.01;
+ point2[0] = length*0.5 + length*0.01;
+
+ T p1, p2;
+ intpolatePressure( &p1,point1 );
+ intpolatePressure( &p2,point2 );
+
+ clout << "pressure1=" << p1;
+ clout << "; pressure2=" << p2;
+
+ T pressureDrop = p1-p2;
+ clout << "; pressureDrop=" << pressureDrop;
+
+ AnalyticalFfromSuperF3D<T> intpolateVelocity( velocity, true );
+ T midVel[3];
+ T mid[3] = {length*0.5, radius, radius};
+ intpolateVelocity(midVel, mid);
+ T mu = converter.getPhysViscosity()*converter.getPhysDensity();
+ T l = point2[0] - point1[0];
+ T vel = midVel[0];
+ T pressureGradient = pressureDrop/l;
+
+ AnalyticalPorousVelocity3D<T> porVel(superGeometry, 3, K, mu, pressureGradient, radius, epsilon);
+
+ /// Darcy law
+ T expectedPressureDrop = vel*mu*l/K;
+ T darcyFlux = K*pressureGradient/mu;
+#ifdef GUO_ZHAO
+ expectedPressureDrop *= epsilon;
+ darcyFlux /= epsilon;
+#endif
+
+ clout << "; expected(darcy)=" << expectedPressureDrop << std::endl;
+ clout << "peakVelocity=" << midVel[0];
+ clout << "; expected(darcy)=" << darcyFlux << std::endl;
+ clout << "peakVelocity(analytical)=" << porVel.getPeakVelocity();
+ clout << "; peakVelocity-error(rel)=" << abs(porVel.getPeakVelocity()-vel)/porVel.getPeakVelocity() << std::endl;
+
+ error(superGeometry, sLattice, converter, porVel);
+
+ // Gnuplot
+ Gnuplot<T> gplot( "velocityProfile" );
+ T uAnalytical[3] = {};
+ T uNumerical[3] = {};
+ for (int i=0; i<101; i++) {
+ T yInput = diameter*i/100.;
+ T input[3] = {length*0.5, yInput, radius};
+ porVel(uAnalytical, input);
+ intpolateVelocity(uNumerical, input);
+ gplot.setData( yInput, {uAnalytical[0], uNumerical[0]}, {"analytical","numerical"} );
+ }
+
+ // Create PNG file
+ gplot.writePNG();
+ }
+}
+
+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] [Permeability]" <<std::endl;
+ clout<<"Default: Resolution=21, Permeability=1e-3" <<std::endl;
+ return 0;
+ }
+ }
+
+ if (argc > 1) {
+ N = atoi(argv[1]);
+ if (N < 1) {
+ std::cerr << "Fluid domain is too small" << std::endl;
+ return 1;
+ }
+ }
+
+ if (argc > 2) {
+ K = atof(argv[2]);
+ if (K < 0) {
+ std::cerr << "Permeabilty must be greater than 0" << std::endl;
+ return 2;
+ }
+ }
+
+ UnitConverterFromResolutionAndRelaxationTime<T, DESCRIPTOR> const converter(
+ int {N}, // resolution: number of voxels per charPhysL
+ (T) tau, // latticeRelaxationTime: relaxation time, have to be greater than 0.5!
+ (T) diameter, // charPhysLength: reference length of simulation geometry
+ (T) physU, // charPhysVelocity: maximal/highest expected velocity during simulation in __m / s__
+ (T) diameter*physU/Re, // physViscosity: physical kinematic viscosity in __m^2 / s__
+ (T) physRho // 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("porousPoiseuille3d");
+
+
+ // === 2nd Step: Prepare Geometry ===
+
+ Vector<T, 3> center0(0, radius, radius);
+ Vector<T, 3> center1(length, radius, radius);
+ IndicatorCylinder3D<T> pipe(center0, center1, radius);
+ IndicatorLayer3D<T> extendedDomain(pipe, converter.getPhysDeltaX());
+
+ // Instantiation of a cuboidGeometry with weights
+#ifdef PARALLEL_MODE_MPI
+ const int noOfCuboids = 2*singleton::mpi().getSize();
+#else // ifdef PARALLEL_MODE_MPI
+ const int noOfCuboids = 6;
+#endif // ifdef PARALLEL_MODE_MPI
+ CuboidGeometry3D<T> cuboidGeometry(extendedDomain, converter.getPhysDeltaX(), noOfCuboids);
+
+ // Instantiation of a loadBalancer
+ HeuristicLoadBalancer<T> loadBalancer(cuboidGeometry);
+
+ // Instantiation of a superGeometry
+ SuperGeometry3D<T> superGeometry(cuboidGeometry, loadBalancer, 2);
+
+ prepareGeometry(converter, superGeometry);
+
+ // === 3rd Step: Prepare Lattice ===
+ SuperLattice3D<T, DESCRIPTOR> sLattice( superGeometry );
+
+ std::unique_ptr<Dynamics<T, DESCRIPTOR>> bulkDynamics;
+
+#ifdef SPAID_PHELAN
+ bulkDynamics.reset(new PorousBGKdynamics<T, DESCRIPTOR>( converter.getLatticeRelaxationFrequency(), instances::getBulkMomenta<T, DESCRIPTOR>() ));
+#elif defined GUO_ZHAO
+ bulkDynamics.reset(new GuoZhaoBGKdynamics<T, DESCRIPTOR>( converter.getLatticeRelaxationFrequency(), instances::getBulkMomenta<T, DESCRIPTOR>() ));
+#endif
+
+
+ // choose between local and non-local boundary condition
+ sOnLatticeBoundaryCondition3D<T, DESCRIPTOR> sOnBoundaryCondition( sLattice );
+ sOffLatticeBoundaryCondition3D<T, DESCRIPTOR> sOffBoundaryCondition(sLattice);
+ createBouzidiBoundaryCondition3D<T, DESCRIPTOR>(sOffBoundaryCondition);
+
+ createInterpBoundaryCondition3D<T, DESCRIPTOR> ( sOnBoundaryCondition );
+
+ prepareLattice(sLattice, converter, *bulkDynamics, sOnBoundaryCondition, sOffBoundaryCondition, superGeometry);
+
+ // === 4th Step: Main Loop with Timer ===
+ clout << "starting simulation..." << endl;
+ Timer<T> timer( converter.getLatticeTime( maxPhysT ), superGeometry.getStatistics().getNvoxel() );
+ util::ValueTracer<T> 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();
+}