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

---
 src/dynamics/advectionDiffusionMomenta.hh | 159 ++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 src/dynamics/advectionDiffusionMomenta.hh

(limited to 'src/dynamics/advectionDiffusionMomenta.hh')

diff --git a/src/dynamics/advectionDiffusionMomenta.hh b/src/dynamics/advectionDiffusionMomenta.hh
new file mode 100644
index 0000000..319a87f
--- /dev/null
+++ b/src/dynamics/advectionDiffusionMomenta.hh
@@ -0,0 +1,159 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2008 Orestis Malaspinas, Andrea Parmigiani
+ *  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.
+*/
+
+/** \file
+ * A collection of dynamics classes (e.g. BGK) with which a Cell object
+ * can be instantiated -- generic implementation.
+ */
+#ifndef ADVECTION_DIFFUSION_MOMENTA_HH
+#define ADVECTION_DIFFUSION_MOMENTA_HH
+
+#include "advectionDiffusionMomenta.h"
+#include "lbHelpers.h"
+
+namespace olb {
+
+////////////////////// Class AdvectionDiffusionBulkMomenta //////////////////////////
+
+template<typename T, typename DESCRIPTOR>
+T AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::computeRho(Cell<T,DESCRIPTOR> const& cell) const
+{
+  return lbHelpers<T,DESCRIPTOR>::computeRho(cell);
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::computeU(Cell<T,DESCRIPTOR> const& cell, T u[DESCRIPTOR::d]) const
+{
+  const T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iD = 0; iD < DESCRIPTOR::d; ++iD) {
+    u[iD] = u_[iD];
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::computeJ(Cell<T,DESCRIPTOR> const& cell, T j[DESCRIPTOR::d]) const
+{
+  lbHelpers<T,DESCRIPTOR>::computeJ(cell, j);
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::computeStress (
+  Cell<T,DESCRIPTOR> const& cell,
+  T rho, const T u[DESCRIPTOR::d],
+  T pi[util::TensorVal<DESCRIPTOR >::n] ) const
+{
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::computeRhoU (
+  Cell<T,DESCRIPTOR> const& cell,
+  T& rho, T u[DESCRIPTOR::d] ) const
+{
+  rho = cell.computeRho();
+  const T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iD = 0; iD < DESCRIPTOR::d; ++iD) {
+    u[iD] = u_[iD];
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::computeAllMomenta (
+  Cell<T,DESCRIPTOR> const& cell,
+  T& rho, T u[DESCRIPTOR::d],
+  T pi[util::TensorVal<DESCRIPTOR >::n] ) const
+{
+  rho = cell.computeRho();
+  const T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iD = 0; iD < DESCRIPTOR::d; ++iD) {
+    u[iD] = u_[iD];
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::defineRho(Cell<T,DESCRIPTOR>& cell, T rho)
+{
+  T *u = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iPop=0; iPop < DESCRIPTOR::q; ++iPop) {
+    cell[iPop] = lbHelpers<T, DESCRIPTOR>::equilibriumFirstOrder( iPop, rho, u );
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::defineU (
+  Cell<T,DESCRIPTOR>& cell,
+  const T u[DESCRIPTOR::d])
+{
+  T rho = cell.computeRho();
+  T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iD = 0; iD < DESCRIPTOR::d; ++iD) {
+    u_[iD] = u[iD];
+  }
+  for (int iPop=0; iPop < DESCRIPTOR::q; ++iPop) {
+    cell[iPop] = lbHelpers<T, DESCRIPTOR>::equilibriumFirstOrder( iPop, rho, u );
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::defineRhoU (
+  Cell<T,DESCRIPTOR>& cell,
+  T rho, const T u[DESCRIPTOR::d])
+{
+  T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iD = 0; iD < DESCRIPTOR::d; ++iD) {
+    u_[iD] = u[iD];
+  }
+  for (int iPop = 0; iPop < DESCRIPTOR::q; ++iPop) {
+    cell[iPop] = lbHelpers<T, DESCRIPTOR>::equilibriumFirstOrder( iPop, rho, u );
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>::defineAllMomenta (
+  Cell<T,DESCRIPTOR>& cell,
+  T rho, const T u[DESCRIPTOR::d],
+  const T pi[util::TensorVal<DESCRIPTOR >::n] )
+{
+  T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>();
+  for (int iD = 0; iD < DESCRIPTOR::d; ++iD) {
+    u_[iD] = u[iD];
+  }
+  for (int iPop = 0; iPop < DESCRIPTOR::q; ++iPop) {
+    cell[iPop] = lbHelpers<T, DESCRIPTOR>::equilibriumFirstOrder( iPop, rho, u );
+  }
+}
+
+/////////////// Singletons //////////////////////////////////
+
+namespace instances {
+
+template<typename T, typename DESCRIPTOR>
+AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>& getAdvectionDiffusionBulkMomenta()
+{
+  static AdvectionDiffusionBulkMomenta<T,DESCRIPTOR> bulkMomentaSingleton;
+  return bulkMomentaSingleton;
+}
+}
+
+}
+
+#endif
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