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/mrtDynamics.h | 97 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 src/dynamics/mrtDynamics.h

(limited to 'src/dynamics/mrtDynamics.h')

diff --git a/src/dynamics/mrtDynamics.h b/src/dynamics/mrtDynamics.h
new file mode 100644
index 0000000..c1d222d
--- /dev/null
+++ b/src/dynamics/mrtDynamics.h
@@ -0,0 +1,97 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2006, 2007 Jonas Latt
+ *  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
+ * This object is a MRT LB dynamics as described in D.Yu et al. in
+ * Progress in Aerospace Sciences 39 (2003) 329-367
+ */
+#ifndef MRT_DYNAMICS_H
+#define MRT_DYNAMICS_H
+
+#include "dynamics/dynamics.h"
+
+namespace olb {
+
+template<typename T, typename DESCRIPTOR> class Cell;
+
+
+/// Implementation of the entropic collision step
+template<typename T, typename DESCRIPTOR>
+class MRTdynamics : public BasicDynamics<T,DESCRIPTOR> {
+public:
+  /// Constructor
+  MRTdynamics(T omega_, Momenta<T,DESCRIPTOR>& momenta_);
+  /// Compute equilibrium distribution function
+  T computeEquilibrium(int iPop, T rho, const T u[DESCRIPTOR::d], T uSqr) const override;
+  /// Compute all equilibrium moments
+  void computeAllEquilibrium(T momentaEq[DESCRIPTOR::q], T rho,
+                          const T u[DESCRIPTOR::d], const T uSqr);
+  /// Collision step
+  void collide(Cell<T,DESCRIPTOR>& cell,
+                       LatticeStatistics<T>& statistics_) override;
+  /// Get local relaxation parameter of the dynamics
+  T getOmega() const override;
+  /// Set local relaxation parameter of the dynamics
+  void setOmega(T omega_) override;
+  /// Get local relaxation parameter of the dynamics
+  T getLambda() const;
+  /// Set local relaxation parameter of the dynamics
+  void setLambda(T lambda_);
+protected:
+  T invM_S[DESCRIPTOR::q][DESCRIPTOR::q]; // relaxation times matrix.
+  T omega; // the shear viscosity relaxation time
+  T lambda;// the bulk viscosity relaxation time
+};
+
+/// Implementation of the entropic collision step
+template<typename T, typename DESCRIPTOR>
+class ForcedMRTdynamics : public MRTdynamics<T,DESCRIPTOR> {
+public:
+  /// Constructor
+  ForcedMRTdynamics(T omega_, Momenta<T,DESCRIPTOR>& momenta_);
+  /// Clone the object on its dynamic type.
+  virtual void collide(Cell<T,DESCRIPTOR>& cell,
+                       LatticeStatistics<T>& statistics_);
+
+};
+
+/// Implementation of the entropic collision step
+template<typename T, typename DESCRIPTOR>
+class MRTdynamics2 : public MRTdynamics<T,DESCRIPTOR> {
+public:
+  /// Constructor
+  MRTdynamics2(T omega_, Momenta<T,DESCRIPTOR>& momenta_);
+  /// Clone the object on its dynamic type.
+  virtual void collide(Cell<T,DESCRIPTOR>& cell,
+                       LatticeStatistics<T>& statistics_);
+
+protected:
+  T invM_S_2[DESCRIPTOR::q][DESCRIPTOR::q]; // relaxation times matrix.
+  T omega;
+};
+
+
+
+}
+
+#endif
-- 
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