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/powerLawBGKdynamics.h | 93 ++++++++++++++++++++++++++++++++++++++
1 file changed, 93 insertions(+)
create mode 100644 src/dynamics/powerLawBGKdynamics.h
(limited to 'src/dynamics/powerLawBGKdynamics.h')
diff --git a/src/dynamics/powerLawBGKdynamics.h b/src/dynamics/powerLawBGKdynamics.h
new file mode 100644
index 0000000..40490ef
--- /dev/null
+++ b/src/dynamics/powerLawBGKdynamics.h
@@ -0,0 +1,93 @@
+/* This file is part of the OpenLB library
+ *
+ * Copyright (C) 2012, 2015 Mathias J. Krause, Vojtech Cvrcek, Davide Dapelo
+ * 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.
+*/
+
+/** \file
+ * BGK Dynamics with adjusted omega -- header file.
+ * Strain rate similar to "J.Boyd, J. Buick and S.Green: A second-order accurate lattice Boltzmann non-Newtonian flow model"
+ * Power Law similar to "Huidan Yu, Sharath S. Girimaji, Li-Shi Luo - DNS and LES of decaying isotropic turbulence with and without frame rotation using lattice Boltzmann method"
+ *
+ */
+#ifndef POWER_LAW_BGK_DYNAMICS_H
+#define POWER_LAW_BGK_DYNAMICS_H
+
+#include "dynamics/dynamics.h"
+#include "core/cell.h"
+
+namespace olb {
+
+/// Implementation of Power-Law Dynamics
+template
+class PowerLawDynamics {
+public:
+ /// Constructor
+ PowerLawDynamics(T m=0.1, T n=.5, T nuMin=T(2.9686e-3), T nuMax=T(3.1667));
+
+protected:
+ /// Computes the local power-Law relaxation parameter
+ T computeOmegaPL ( Cell& cell, T omega0,
+ T rho, T pi[util::TensorVal::n] );
+ /// Computes squared norm of non-equilibrium part of 2nd momentum
+ virtual T PiNeqNormSqr(Cell& cell ) =0;
+
+protected:
+ T _m;
+ T _n;
+ T _omegaMin;
+ T _omegaMax;
+};
+
+/// Implementation of the BGK collision step
+template
+class PowerLawBGKdynamics : public BGKdynamics, public PowerLawDynamics {
+public:
+ /// Constructor
+ /// m,n...parameter in the power law model
+ PowerLawBGKdynamics(T omega, Momenta& momenta, T m=0.1, T n=.5, T nuMin=T(2.9686e-3), T nuMax=T(3.1667));
+
+ /// Collision step
+ void collide(Cell& cell, LatticeStatistics& statistics) override;
+
+protected:
+ /// Computes squared norm of non-equilibrium part of 2nd momentum
+ virtual T PiNeqNormSqr(Cell& cell ) override;
+};
+
+/// Implementation of the forced BGK collision step
+template
+class PowerLawForcedBGKdynamics : public ForcedBGKdynamics, public PowerLawDynamics {
+public:
+ /// Constructor
+ /// m,n...parameter in the power law model
+ PowerLawForcedBGKdynamics(T omega, Momenta& momenta, T m=0.1, T n=.5, T nuMin=T(2.9686e-3), T nuMax=T(3.1667));
+
+ /// Collision step
+ virtual void collide(Cell& cell, LatticeStatistics& statistics) override;
+
+protected:
+ /// Computes squared norm of non-equilibrium part of 2nd momentum
+ virtual T PiNeqNormSqr(Cell& cell ) override;
+};
+
+}
+
+#endif
--
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