summaryrefslogtreecommitdiff
path: root/src/refinement
diff options
context:
space:
mode:
Diffstat (limited to 'src/refinement')
-rw-r--r--src/refinement/MakeHeader27
-rw-r--r--src/refinement/coupler2D.cpp36
-rw-r--r--src/refinement/coupler2D.h85
-rw-r--r--src/refinement/coupler2D.hh348
-rw-r--r--src/refinement/grid2D.cpp34
-rw-r--r--src/refinement/grid2D.h87
-rw-r--r--src/refinement/grid2D.hh208
-rw-r--r--src/refinement/module.mk27
-rw-r--r--src/refinement/refinement2D.h27
-rw-r--r--src/refinement/refinement2D.hh27
10 files changed, 906 insertions, 0 deletions
diff --git a/src/refinement/MakeHeader b/src/refinement/MakeHeader
new file mode 100644
index 0000000..bfcbf33
--- /dev/null
+++ b/src/refinement/MakeHeader
@@ -0,0 +1,27 @@
+# This file is part of the OpenLB library
+#
+# Copyright (C) 2019 Adrian Kummerländer
+# 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.
+
+
+generic :=
+
+precompiled := grid2D \
+ coupler2D
diff --git a/src/refinement/coupler2D.cpp b/src/refinement/coupler2D.cpp
new file mode 100644
index 0000000..37997f5
--- /dev/null
+++ b/src/refinement/coupler2D.cpp
@@ -0,0 +1,36 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ * 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.
+ */
+
+#include "coupler2D.h"
+#include "coupler2D.hh"
+
+#include "dynamics/latticeDescriptors.h"
+#include "dynamics/latticeDescriptors.hh"
+
+namespace olb {
+
+template class Coupler2D<double,descriptors::D2Q9Descriptor>;
+template class FineCoupler2D<double,descriptors::D2Q9Descriptor>;
+template class CoarseCoupler2D<double,descriptors::D2Q9Descriptor>;
+
+}
diff --git a/src/refinement/coupler2D.h b/src/refinement/coupler2D.h
new file mode 100644
index 0000000..b218eff
--- /dev/null
+++ b/src/refinement/coupler2D.h
@@ -0,0 +1,85 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ * 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.
+*/
+
+#ifndef REFINEMENT_COUPLER_2D_H
+#define REFINEMENT_COUPLER_2D_H
+
+#include "grid2D.h"
+
+namespace olb {
+
+
+template <typename T, template<typename> class DESCRIPTOR>
+class Coupler2D {
+protected:
+ Grid2D<T,DESCRIPTOR>& _coarse;
+ Grid2D<T,DESCRIPTOR>& _fine;
+
+ const int _coarseSize;
+ const int _fineSize;
+ const bool _vertical;
+
+ Vector<T,2> _physOrigin;
+ Vector<int,3> _coarseOrigin;
+ Vector<int,3> _fineOrigin;
+
+ Vector<int,3> getFineLatticeR(int y) const;
+ Vector<int,3> getCoarseLatticeR(int y) const;
+
+public:
+ Coupler2D(Grid2D<T,DESCRIPTOR>& coarse, Grid2D<T,DESCRIPTOR>& fine,
+ Vector<T,2> origin, Vector<T,2> extend);
+
+};
+
+template <typename T, template<typename> class DESCRIPTOR>
+class FineCoupler2D : public Coupler2D<T,DESCRIPTOR> {
+private:
+ std::vector<T> _c2f_rho;
+ std::vector<Vector<T,2>> _c2f_u;
+ std::vector<Vector<T,DESCRIPTOR<T>::q>> _c2f_fneq;
+
+public:
+ FineCoupler2D(Grid2D<T,DESCRIPTOR>& coarse, Grid2D<T,DESCRIPTOR>& fine,
+ Vector<T,2> origin, Vector<T,2> extend);
+
+ void store();
+ void interpolate();
+ void couple();
+
+};
+
+template <typename T, template<typename> class DESCRIPTOR>
+class CoarseCoupler2D : public Coupler2D<T,DESCRIPTOR> {
+public:
+ CoarseCoupler2D(Grid2D<T,DESCRIPTOR>& coarse, Grid2D<T,DESCRIPTOR>& fine,
+ Vector<T,2> origin, Vector<T,2> extend);
+
+ void couple();
+
+};
+
+
+}
+
+#endif
diff --git a/src/refinement/coupler2D.hh b/src/refinement/coupler2D.hh
new file mode 100644
index 0000000..49efe57
--- /dev/null
+++ b/src/refinement/coupler2D.hh
@@ -0,0 +1,348 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ * 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.
+*/
+
+#ifndef REFINEMENT_COUPLER_2D_HH
+#define REFINEMENT_COUPLER_2D_HH
+
+#include "coupler2D.h"
+
+#include "dynamics/lbHelpers.h"
+
+namespace olb {
+
+
+template <typename T, template<typename> class DESCRIPTOR>
+void computeFeq(const Cell<T,DESCRIPTOR>& cell, T fEq[DESCRIPTOR<T>::q])
+{
+ T rho{};
+ T u[2] {};
+ cell.computeRhoU(rho, u);
+ const T uSqr = u[0]*u[0] + u[1]*u[1];
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ fEq[iPop] = lbHelpers<T,DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr);
+ }
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void computeFneq(const Cell<T,DESCRIPTOR>& cell, T fNeq[DESCRIPTOR<T>::q])
+{
+ T rho{};
+ T u[2] {};
+ cell.computeRhoU(rho, u);
+ lbHelpers<T,DESCRIPTOR>::computeFneq(cell, fNeq, rho, u);
+}
+
+template <typename T>
+T order4interpolation(T fm3, T fm1, T f1, T f3)
+{
+ return 9./16. * (fm1 + f1) - 1./16. * (fm3 + f3);
+}
+
+template <typename T>
+T order3interpolation(T fm1, T f1, T f3)
+{
+ return 3./8. * fm1 + 3./4. * f1 - 1./8. * f3;
+}
+
+template <typename T>
+T order2interpolation(T f0, T f1)
+{
+ return 0.5 * (f0 + f1);
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void computeRestrictedFneq(const SuperLattice2D<T,DESCRIPTOR>& lattice, Vector<int,3> pos, T restrictedFneq[DESCRIPTOR<T>::q])
+{
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ T fNeq[DESCRIPTOR<T>::q] {};
+ computeFneq(lattice.get(pos[0], pos[1] + DESCRIPTOR<T>::c[iPop][0], pos[2] + DESCRIPTOR<T>::c[iPop][1]), fNeq);
+
+ for (int jPop=0; jPop < DESCRIPTOR<T>::q; ++jPop) {
+ restrictedFneq[jPop] += fNeq[jPop];
+ }
+ }
+
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ restrictedFneq[iPop] /= DESCRIPTOR<T>::q;
+ }
+}
+
+
+template <typename T, template<typename> class DESCRIPTOR>
+Vector<int,3> Coupler2D<T,DESCRIPTOR>::getFineLatticeR(int y) const
+{
+ if (_vertical) {
+ return _fineOrigin + Vector<int,3> {0, 0, y};
+ }
+ else {
+ return _fineOrigin + Vector<int,3> {0, y, 0};
+ }
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+Vector<int,3> Coupler2D<T,DESCRIPTOR>::getCoarseLatticeR(int y) const
+{
+ if (_vertical) {
+ return _coarseOrigin + Vector<int,3> {0, 0, y};
+ }
+ else {
+ return _coarseOrigin + Vector<int,3> {0, y, 0};
+ }
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+Coupler2D<T,DESCRIPTOR>::Coupler2D(Grid2D<T,DESCRIPTOR>& coarse, Grid2D<T,DESCRIPTOR>& fine,
+ Vector<T,2> origin, Vector<T,2> extend):
+ _coarse(coarse),
+ _fine(fine),
+ _coarseSize(floor(extend.norm() / coarse.getConverter().getPhysDeltaX() + 0.5)+1),
+ _fineSize(2*_coarseSize-1),
+ _vertical(util::nearZero(extend[0]))
+{
+ OLB_ASSERT(util::nearZero(extend[0]) || util::nearZero(extend[1]), "Coupling is only implemented alongside unit vectors");
+
+ const auto& coarseGeometry = _coarse.getCuboidGeometry();
+ const auto& fineGeometry = _fine.getCuboidGeometry();
+
+ Vector<int,3> tmpLatticeOrigin{};
+ coarseGeometry.getLatticeR(origin, tmpLatticeOrigin);
+ _physOrigin = coarseGeometry.getPhysR(tmpLatticeOrigin.toStdVector());
+
+ coarseGeometry.getLatticeR(_physOrigin, _coarseOrigin);
+ fineGeometry.getLatticeR(_physOrigin, _fineOrigin);
+}
+
+
+template <typename T, template<typename> class DESCRIPTOR>
+FineCoupler2D<T,DESCRIPTOR>::FineCoupler2D(Grid2D<T,DESCRIPTOR>& coarse, Grid2D<T,DESCRIPTOR>& fine,
+ Vector<T,2> origin, Vector<T,2> extend):
+ Coupler2D<T,DESCRIPTOR>(coarse, fine, origin, extend),
+ _c2f_rho(this->_coarseSize),
+ _c2f_u(this->_coarseSize, Vector<T,2>(T{})),
+ _c2f_fneq(this->_coarseSize, Vector<T,DESCRIPTOR<T>::q>(T{}))
+{
+ OstreamManager clout(std::cout,"C2F");
+ clout << "coarse origin: " << this->_coarseOrigin[0] << " " << this->_coarseOrigin[1] << " " << this->_coarseOrigin[2] << std::endl;
+ clout << "fine origin: " << this->_fineOrigin[0] << " " << this->_fineOrigin[1] << " " << this->_fineOrigin[2] << std::endl;
+ clout << "fine size: " << this->_fineSize << std::endl;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void FineCoupler2D<T,DESCRIPTOR>::store()
+{
+ auto& coarseLattice = this->_coarse.getSuperLattice();
+
+ for (int y=0; y < this->_coarseSize; ++y) {
+ const auto pos = this->getCoarseLatticeR(y);
+
+ T rho{};
+ T u[2] {};
+ T fNeq[DESCRIPTOR<T>::q] {};
+ coarseLattice.get(pos).computeRhoU(rho, u);
+ computeFneq(coarseLattice.get(pos), fNeq);
+
+ _c2f_rho[y] = rho;
+ _c2f_u[y] = Vector<T,2>(u);
+ _c2f_fneq[y] = Vector<T,DESCRIPTOR<T>::q>(fNeq);
+ }
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void FineCoupler2D<T,DESCRIPTOR>::interpolate()
+{
+ auto& coarseLattice = this->_coarse.getSuperLattice();
+
+ for (int y=0; y < this->_coarseSize; ++y) {
+ const auto coarsePos = this->getCoarseLatticeR(y);
+
+ T rho{};
+ T u[2] {};
+ coarseLattice.get(coarsePos).computeRhoU(rho, u);
+ _c2f_rho[y] = order2interpolation(rho, _c2f_rho[y]);
+ _c2f_u[y][0] = order2interpolation(u[0], _c2f_u[y][0]);
+ _c2f_u[y][1] = order2interpolation(u[1], _c2f_u[y][1]);
+
+ T fNeq[DESCRIPTOR<T>::q] {};
+ computeFneq(coarseLattice.get(coarsePos), fNeq);
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ _c2f_fneq[y][iPop] = order2interpolation(fNeq[iPop], _c2f_fneq[y][iPop]);
+ }
+ }
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void FineCoupler2D<T,DESCRIPTOR>::couple()
+{
+ auto& coarseLattice = this->_coarse.getSuperLattice();
+ auto& fineLattice = this->_fine.getSuperLattice();
+
+ for (int y=0; y < this->_coarseSize; ++y) {
+ const auto coarsePos = this->getCoarseLatticeR(y);
+ const auto finePos = this->getFineLatticeR(2*y);
+
+ T fEq[DESCRIPTOR<T>::q] {};
+ computeFeq(coarseLattice.get(coarsePos), fEq);
+
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ fineLattice.get(finePos)[iPop] = fEq[iPop] + this->_coarse.getScalingFactor() * _c2f_fneq[y][iPop];
+ }
+ }
+
+ for (int y=1; y < this->_coarseSize-2; ++y) {
+ const T rho = order4interpolation(
+ _c2f_rho[y-1],
+ _c2f_rho[y],
+ _c2f_rho[y+1],
+ _c2f_rho[y+2]
+ );
+ T u[2] {};
+ u[0] = order4interpolation(
+ _c2f_u[y-1][0],
+ _c2f_u[y][0],
+ _c2f_u[y+1][0],
+ _c2f_u[y+2][0]
+ );
+ u[1] = order4interpolation(
+ _c2f_u[y-1][1],
+ _c2f_u[y][1],
+ _c2f_u[y+1][1],
+ _c2f_u[y+2][1]
+ );
+ const T uSqr = u[0]*u[0] + u[1]*u[1];
+
+ const auto finePos = this->getFineLatticeR(1+2*y);
+
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ const T fneq = order4interpolation(
+ _c2f_fneq[y-1][iPop],
+ _c2f_fneq[y][iPop],
+ _c2f_fneq[y+1][iPop],
+ _c2f_fneq[y+2][iPop]
+ );
+
+ fineLattice.get(finePos)[iPop] = lbHelpers<T,DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr) + this->_coarse.getScalingFactor() * fneq;
+ }
+ }
+
+ {
+ const T rho = order3interpolation(
+ _c2f_rho[0],
+ _c2f_rho[1],
+ _c2f_rho[2]
+ );
+ T u[2] {};
+ u[0] = order3interpolation(
+ _c2f_u[0][0],
+ _c2f_u[1][0],
+ _c2f_u[2][0]
+ );
+ u[1] = order3interpolation(
+ _c2f_u[0][1],
+ _c2f_u[1][1],
+ _c2f_u[2][1]
+ );
+ const T uSqr = u[0]*u[0] + u[1]*u[1];
+
+ const auto finePos = this->getFineLatticeR(1);
+
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ const T fneq = order3interpolation(
+ _c2f_fneq[0][iPop],
+ _c2f_fneq[1][iPop],
+ _c2f_fneq[2][iPop]
+ );
+ fineLattice.get(finePos)[iPop] = lbHelpers<T,DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr) + this->_coarse.getScalingFactor() * fneq;
+ }
+ }
+
+ {
+ const T rho = order3interpolation(
+ _c2f_rho[this->_coarseSize-1],
+ _c2f_rho[this->_coarseSize-2],
+ _c2f_rho[this->_coarseSize-3]
+ );
+ T u[2] {};
+ u[0] = order3interpolation(
+ _c2f_u[this->_coarseSize-1][0],
+ _c2f_u[this->_coarseSize-2][0],
+ _c2f_u[this->_coarseSize-3][0]
+ );
+ u[1] = order3interpolation(
+ _c2f_u[this->_coarseSize-1][1],
+ _c2f_u[this->_coarseSize-2][1],
+ _c2f_u[this->_coarseSize-3][1]
+ );
+ const T uSqr = u[0]*u[0] + u[1]*u[1];
+
+ const auto finePos = this->getFineLatticeR(this->_fineSize-2);
+
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ const T fneq = order3interpolation(
+ _c2f_fneq[this->_coarseSize-1][iPop],
+ _c2f_fneq[this->_coarseSize-2][iPop],
+ _c2f_fneq[this->_coarseSize-3][iPop]
+ );
+ fineLattice.get(finePos)[iPop] = lbHelpers<T,DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr) + this->_coarse.getScalingFactor() * fneq;
+ }
+ }
+}
+
+
+template <typename T, template<typename> class DESCRIPTOR>
+CoarseCoupler2D<T,DESCRIPTOR>::CoarseCoupler2D(
+ Grid2D<T,DESCRIPTOR>& coarse, Grid2D<T,DESCRIPTOR>& fine,
+ Vector<T,2> origin, Vector<T,2> extend):
+ Coupler2D<T,DESCRIPTOR>(coarse, fine, origin, extend)
+{
+ OstreamManager clout(std::cout,"F2C");
+ clout << "coarse origin: " << this->_coarseOrigin[0] << " " << this->_coarseOrigin[1] << " " << this->_coarseOrigin[2] << std::endl;
+ clout << "fine origin: " << this->_fineOrigin[0] << " " << this->_fineOrigin[1] << " " << this->_fineOrigin[2] << std::endl;
+ clout << "coarse size: " << this->_coarseSize << std::endl;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void CoarseCoupler2D<T,DESCRIPTOR>::couple()
+{
+ auto& fineLattice = this->_fine.getSuperLattice();
+ auto& coarseLattice = this->_coarse.getSuperLattice();
+
+ for (int y=0; y < this->_coarseSize; ++y) {
+ const auto finePos = this->getFineLatticeR(2*y);
+ const auto coarsePos = this->getCoarseLatticeR(y);
+
+ T fEq[DESCRIPTOR<T>::q] {};
+ computeFeq(fineLattice.get(finePos), fEq);
+
+ T fNeq[DESCRIPTOR<T>::q] {};
+ computeRestrictedFneq(fineLattice, finePos, fNeq);
+
+ for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
+ coarseLattice.get(coarsePos)[iPop] = fEq[iPop] + this->_coarse.getInvScalingFactor() * fNeq[iPop];
+ }
+ }
+}
+
+
+}
+
+#endif
diff --git a/src/refinement/grid2D.cpp b/src/refinement/grid2D.cpp
new file mode 100644
index 0000000..b371d0c
--- /dev/null
+++ b/src/refinement/grid2D.cpp
@@ -0,0 +1,34 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ * 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.
+ */
+
+#include "grid2D.h"
+#include "grid2D.hh"
+
+#include "dynamics/latticeDescriptors.h"
+#include "dynamics/latticeDescriptors.hh"
+
+namespace olb {
+
+template class Grid2D<double,descriptors::D2Q9Descriptor>;
+
+}
diff --git a/src/refinement/grid2D.h b/src/refinement/grid2D.h
new file mode 100644
index 0000000..fda38ed
--- /dev/null
+++ b/src/refinement/grid2D.h
@@ -0,0 +1,87 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ * 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.
+*/
+
+#ifndef REFINEMENT_GRID_2D_H
+#define REFINEMENT_GRID_2D_H
+
+#include <memory>
+#include <vector>
+
+#include "core/unitConverter.h"
+#include "core/superLattice2D.h"
+#include "geometry/superGeometry2D.h"
+#include "geometry/cuboidGeometry2D.h"
+#include "geometry/superGeometry2D.h"
+#include "communication/loadBalancer.h"
+#include "functors/analytical/indicator/indicatorF2D.h"
+
+namespace olb {
+
+
+template <typename T, template<typename> class DESCRIPTOR> class FineCoupler2D;
+template <typename T, template<typename> class DESCRIPTOR> class CoarseCoupler2D;
+
+template <typename T, template<typename> class DESCRIPTOR>
+class Grid2D {
+private:
+ std::unique_ptr<UnitConverter<T,DESCRIPTOR>> _converter;
+ std::unique_ptr<CuboidGeometry2D<T>> _cuboids;
+ std::unique_ptr<LoadBalancer<T>> _balancer;
+ std::unique_ptr<SuperGeometry2D<T>> _geometry;
+ std::unique_ptr<SuperLattice2D<T,DESCRIPTOR>> _lattice;
+
+ std::vector<std::unique_ptr<Grid2D<T,DESCRIPTOR>>> _fineGrids;
+
+ std::vector<std::unique_ptr<FineCoupler2D<T,DESCRIPTOR>>> _fineCouplers;
+ std::vector<std::unique_ptr<CoarseCoupler2D<T,DESCRIPTOR>>> _coarseCouplers;
+
+public:
+ static std::unique_ptr<Grid2D<T,DESCRIPTOR>> make(IndicatorF2D<T>& domainF, int resolution, T tau, int re);
+
+ Grid2D(IndicatorF2D<T>& domainF, int resolution, T tau, int re);
+
+ UnitConverter<T,DESCRIPTOR>& getConverter();
+ CuboidGeometry2D<T>& getCuboidGeometry();
+ LoadBalancer<T>& getLoadBalancer();
+ SuperGeometry2D<T>& getSuperGeometry();
+ SuperLattice2D<T,DESCRIPTOR>& getSuperLattice();
+
+ T getScalingFactor();
+ T getInvScalingFactor();
+
+ void collideAndStream();
+
+ FineCoupler2D<T,DESCRIPTOR>& addFineCoupling(
+ Grid2D<T,DESCRIPTOR>& fineGrid, Vector<T,2> origin, Vector<T,2> extend);
+ CoarseCoupler2D<T,DESCRIPTOR>& addCoarseCoupling(
+ Grid2D<T,DESCRIPTOR>& fineGrid, Vector<T,2> origin, Vector<T,2> extend);
+
+ Grid2D<T,DESCRIPTOR>& refine(IndicatorF2D<T>& domainF);
+ Grid2D<T,DESCRIPTOR>& refine(Vector<T,2> origin, Vector<T,2> extend);
+
+};
+
+
+}
+
+#endif
diff --git a/src/refinement/grid2D.hh b/src/refinement/grid2D.hh
new file mode 100644
index 0000000..86c3102
--- /dev/null
+++ b/src/refinement/grid2D.hh
@@ -0,0 +1,208 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ * 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.
+*/
+
+#ifndef REFINEMENT_GRID_2D_HH
+#define REFINEMENT_GRID_2D_HH
+
+#include "grid2D.h"
+#include "coupler2D.hh"
+
+#include "communication/heuristicLoadBalancer.h"
+
+namespace olb {
+
+
+template <typename T, template<typename> class DESCRIPTOR>
+std::unique_ptr<Grid2D<T,DESCRIPTOR>> Grid2D<T,DESCRIPTOR>::make(
+ IndicatorF2D<T>& domainF,
+ int resolution, T tau, int re)
+{
+ return std::unique_ptr<Grid2D<T,DESCRIPTOR>>(
+ new Grid2D<T,DESCRIPTOR>(domainF, resolution, tau, re)
+ );
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+Grid2D<T,DESCRIPTOR>::Grid2D(IndicatorF2D<T>& domainF, int resolution, T tau, int re):
+ _converter(new UnitConverterFromResolutionAndRelaxationTime<T,DESCRIPTOR>(
+ resolution, // resolution: number of voxels per charPhysL
+ tau, // latticeRelaxationTime: relaxation time, has 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}, // physDensity: physical density in __kg / m^3__
+ T{1})),
+ _cuboids(new CuboidGeometry2D<T>(
+ domainF,
+ _converter->getConversionFactorLength(),
+ 1)),
+ _balancer(new HeuristicLoadBalancer<T>(
+ *_cuboids)),
+ _geometry(new SuperGeometry2D<T>(
+ *_cuboids,
+ *_balancer,
+ 2)),
+ _lattice(new SuperLattice2D<T,DESCRIPTOR>(
+ *_geometry))
+{
+ _converter->print();
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+UnitConverter<T,DESCRIPTOR>& Grid2D<T,DESCRIPTOR>::getConverter()
+{
+ return *_converter;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+CuboidGeometry2D<T>& Grid2D<T,DESCRIPTOR>::getCuboidGeometry()
+{
+ return *_cuboids;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+LoadBalancer<T>& Grid2D<T,DESCRIPTOR>::getLoadBalancer()
+{
+ return *_balancer;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+SuperGeometry2D<T>& Grid2D<T,DESCRIPTOR>::getSuperGeometry()
+{
+ return *_geometry;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+SuperLattice2D<T,DESCRIPTOR>& Grid2D<T,DESCRIPTOR>::getSuperLattice()
+{
+ return *_lattice;
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+T Grid2D<T,DESCRIPTOR>::getScalingFactor()
+{
+ return 4. - _converter->getLatticeRelaxationFrequency();
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+T Grid2D<T,DESCRIPTOR>::getInvScalingFactor()
+{
+ return 1./getScalingFactor();
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+void Grid2D<T,DESCRIPTOR>::collideAndStream()
+{
+ for ( auto& fineCoupler : _fineCouplers ) {
+ fineCoupler->store();
+ }
+
+ this->getSuperLattice().collideAndStream();
+
+ for ( auto& fineGrid : _fineGrids ) {
+ fineGrid->getSuperLattice().collideAndStream();
+ }
+
+ for ( auto& fineCoupler : _fineCouplers ) {
+ fineCoupler->interpolate();
+ fineCoupler->couple();
+ }
+
+ for ( auto& fineGrid : _fineGrids ) {
+ fineGrid->getSuperLattice().collideAndStream();
+ }
+
+ for ( auto& fineCoupler : _fineCouplers ) {
+ fineCoupler->store();
+ fineCoupler->couple();
+ }
+
+ for ( auto& coarseCoupler : _coarseCouplers ) {
+ coarseCoupler->couple();
+ }
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+FineCoupler2D<T,DESCRIPTOR>& Grid2D<T,DESCRIPTOR>::addFineCoupling(
+ Grid2D<T,DESCRIPTOR>& fineGrid, Vector<T,2> origin, Vector<T,2> extend)
+{
+ _fineCouplers.emplace_back(
+ new FineCoupler2D<T,DESCRIPTOR>(
+ *this, fineGrid, origin, extend));
+ return *_fineCouplers.back();
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+CoarseCoupler2D<T,DESCRIPTOR>& Grid2D<T,DESCRIPTOR>::addCoarseCoupling(
+ Grid2D<T,DESCRIPTOR>& fineGrid, Vector<T,2> origin, Vector<T,2> extend)
+{
+ _coarseCouplers.emplace_back(
+ new CoarseCoupler2D<T,DESCRIPTOR>(
+ *this, fineGrid, origin, extend));
+ return *_coarseCouplers.back();
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+Grid2D<T,DESCRIPTOR>& Grid2D<T,DESCRIPTOR>::refine(IndicatorF2D<T>& domainF)
+{
+ _fineGrids.emplace_back(
+ new Grid2D<T,DESCRIPTOR>(
+ domainF,
+ 2*getConverter().getResolution(),
+ 2.0*getConverter().getLatticeRelaxationTime() - 0.5,
+ getConverter().getReynoldsNumber()
+ ));
+ return *_fineGrids.back();
+}
+
+template <typename T, template<typename> class DESCRIPTOR>
+Grid2D<T,DESCRIPTOR>& Grid2D<T,DESCRIPTOR>::refine(Vector<T,2> origin, Vector<T,2> extend)
+{
+ IndicatorCuboid2D<T> fineCuboid(extend, origin);
+ auto& fineGrid = refine(fineCuboid);
+
+ const Vector<T,2> extendX = {extend[0],0};
+ const Vector<T,2> extendY = {0,extend[1]};
+
+ addFineCoupling(fineGrid, origin, extendY);
+ addFineCoupling(fineGrid, origin + extendX, extendY);
+ addFineCoupling(fineGrid, origin + extendY, extendX);
+ addFineCoupling(fineGrid, origin, extendX);
+
+ const T coarseDeltaX = getConverter().getPhysDeltaX();
+ const Vector<T,2> innerOrigin = origin + coarseDeltaX;
+ const Vector<T,2> innerExtendX = extendX - Vector<T,2> {2*coarseDeltaX,0};
+ const Vector<T,2> innerExtendY = extendY - Vector<T,2> {0,2*coarseDeltaX};
+
+ addCoarseCoupling(fineGrid, innerOrigin, innerExtendY);
+ addCoarseCoupling(fineGrid, innerOrigin + innerExtendX, innerExtendY);
+ addCoarseCoupling(fineGrid, innerOrigin + innerExtendY, innerExtendX);
+ addCoarseCoupling(fineGrid, innerOrigin, innerExtendX);
+
+ return fineGrid;
+}
+
+
+}
+
+#endif
diff --git a/src/refinement/module.mk b/src/refinement/module.mk
new file mode 100644
index 0000000..6e42e3e
--- /dev/null
+++ b/src/refinement/module.mk
@@ -0,0 +1,27 @@
+# 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 $(addsuffix /MakeHeader, $(current_dir))
+
+LIB_OBJECTS += $(foreach file, $($(BUILDTYPE)), $(OBJDIR)/$(current_dir)$(file).o)
diff --git a/src/refinement/refinement2D.h b/src/refinement/refinement2D.h
new file mode 100644
index 0000000..2dc726d
--- /dev/null
+++ b/src/refinement/refinement2D.h
@@ -0,0 +1,27 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ *
+ * 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.
+*/
+
+#ifndef REFINEMENT_2D_H
+#define REFINEMENT_2D_H
+
+#include "grid2D.h"
+#include "coupler2D.h"
+
+#endif
diff --git a/src/refinement/refinement2D.hh b/src/refinement/refinement2D.hh
new file mode 100644
index 0000000..b21af48
--- /dev/null
+++ b/src/refinement/refinement2D.hh
@@ -0,0 +1,27 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2019 Adrian Kummerländer
+ *
+ * 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.
+*/
+
+#ifndef REFINEMENT_2D_HH
+#define REFINEMENT_2D_HH
+
+#include "grid2D.hh"
+#include "coupler2D.hh"
+
+#endif