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/boundary/inamuroNewtonRaphsonDynamics.h | 84 +++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 src/boundary/inamuroNewtonRaphsonDynamics.h

(limited to 'src/boundary/inamuroNewtonRaphsonDynamics.h')

diff --git a/src/boundary/inamuroNewtonRaphsonDynamics.h b/src/boundary/inamuroNewtonRaphsonDynamics.h
new file mode 100644
index 0000000..d4d5968
--- /dev/null
+++ b/src/boundary/inamuroNewtonRaphsonDynamics.h
@@ -0,0 +1,84 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2006, 2007 Orestis Malaspinas, 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.
+*/
+
+#ifndef INAMURO_NEWTON_RAPHSON_DYNAMICS_H
+#define INAMURO_NEWTON_RAPHSON_DYNAMICS_H
+
+#include "dynamics/dynamics.h"
+#include "io/ostreamManager.h"
+
+namespace olb {
+
+/**
+* This class computes the inamuro BC with general dynamics. It uses the formula from the
+ * paper by Inamuro et al. but since there is no explict solution
+ * for a lattice different from the D2Q9 and for a speed of sound
+ * c_s=q/sqrt(3), we have to use a Newton-Raphson algorithm to
+ * implement these boundary conditions.
+*/
+template<typename T, typename DESCRIPTOR, typename Dynamics, int direction, int orientation>
+class InamuroNewtonRaphsonDynamics : public BasicDynamics<T,DESCRIPTOR> {
+public:
+  /// Constructor
+  InamuroNewtonRaphsonDynamics(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;
+  /// 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;
+private:
+  void computeApproxMomentum(T approxMomentum[DESCRIPTOR::d],
+                             const Cell<T,DESCRIPTOR> &cell,
+                             const T &rho, const T u[DESCRIPTOR::d], const T xi[DESCRIPTOR::d],
+                             const std::vector<int> knownIndexes,const std::vector<int> missingIndexes);
+
+  /// compute the error (L^2 norm of (u-uApprox))
+  T computeError(const T &rho,const T u[DESCRIPTOR::d], const T approxMomentum[DESCRIPTOR::d]);
+
+  void computeGradGradError(T gradGradError[DESCRIPTOR::d][DESCRIPTOR::d],
+                            T gradError[DESCRIPTOR::d],
+                            const T &rho, const T u[DESCRIPTOR::d],const T xi[DESCRIPTOR::d],
+                            const T approxMomentum[DESCRIPTOR::d],
+                            const std::vector<int> missingIndexes);
+
+  /// compute the new xi with the newton raphson algorithm
+  bool newtonRaphson(T xi[DESCRIPTOR::d],
+                     const T gradError[DESCRIPTOR::d],
+                     const T gradGradError[DESCRIPTOR::d][DESCRIPTOR::d]);
+
+  bool invert(const T a[2][2],T b[2][2]);
+
+  bool invert(const T a[3][3],T b[3][3]);
+
+  Dynamics _boundaryDynamics;
+  T _xi[DESCRIPTOR::d];
+  mutable OstreamManager clout;
+};
+
+}
+
+#endif
-- 
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