Initialize at openlb-1-3

1 files changed, 85 insertions, 0 deletions

diff --git a/src/particles/forces/magneticForceForMagP3D.hh b/src/particles/forces/magneticForceForMagP3D.hh
new file mode 100755
index 0000000..0193114
--- /dev/null
+++ b/src/particles/forces/magneticForceForMagP3D.hh
@@ -0,0 +1,85 @@
+/*
+ *  Copyright (C) 2015 Marie-Luise Maier, Mathias J. Krause, Sascha Janz
+ *  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.
+ */
+
+/** Alberto Di Renzo, Francesco Paolo Di Maio:
+ * "Comparison of contact-force models for the simulation of collisions in
+ * DEM-based granular ow codes",
+ * Chemical Engineering Science 59 (2004) 525 - 541
+ */
+
+#ifndef MagneticForceForMagP3D_HH
+#define MagneticForceForMagP3D_HH
+
+#include <cmath>
+#include <vector>
+#include "magneticForceForMagP3D.h"
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+namespace olb {
+
+template<typename T, template<typename U> class PARTICLETYPE, typename DESCRIPTOR>
+MagneticForceForMagP3D<T, PARTICLETYPE, DESCRIPTOR>::MagneticForceForMagP3D(
+  AnalyticalF3D<T, T>& getMagForce, AnalyticalF3D<T, T>& getMagField, T scale) :
+  Force3D<T, PARTICLETYPE>(), _getMagForce(getMagForce), _getMagField(getMagField), _scale(scale)
+{ }
+
+template<typename T, template<typename U> class PARTICLETYPE, typename DESCRIPTOR>
+void MagneticForceForMagP3D<T, PARTICLETYPE, DESCRIPTOR>::applyForce(
+  typename std::deque<PARTICLETYPE<T> >::iterator p, int pInt,
+  ParticleSystem3D<T, PARTICLETYPE>& pSys)
+{
+
+  T m_p = p->getMagnetisation();
+  T mu_0 = 4 * 3.14159265e-7;
+  T mu_i = 4. / 3.*M_PI * pow(p->getRad(), 3) * m_p; // norm mag. dipole moment
+
+  T pos[3] = { T(), T(), T() };
+  pos[0] = p->getPos()[0];
+  pos[1] = p->getPos()[1];
+  pos[2] = p->getPos()[2];
+
+  T forceHelp[3] = { T(), T(), T() };
+  _getMagForce(forceHelp, pos);
+  T fieldHelp[3] = { T(), T(), T() };
+  _getMagField(fieldHelp, pos);
+
+  Vector<T, 3> dMom(p->getMoment()); // orientation vector mag. dipole moment
+  dMom *= mu_i; // vector mag. dipole moment
+
+  Vector<T, 3> fieldVec(fieldHelp); // H-Field
+  Vector<T, 3> trq = crossProduct3D(dMom, fieldVec); // T = mu_0 mu x H
+  trq *= mu_0;
+
+  p->getTorque()[0] += trq[0];
+  p->getTorque()[1] += trq[1];
+  p->getTorque()[2] += trq[2];
+  p->getForce()[0] += forceHelp[0] * _scale;
+  p->getForce()[1] += forceHelp[1] * _scale;
+  p->getForce()[2] += forceHelp[2] * _scale;
+
+}
+
+}
+#endif