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

---
 .../lattice/blockLatticeRefinementMetricF2D.hh     | 129 +++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 src/functors/lattice/blockLatticeRefinementMetricF2D.hh

(limited to 'src/functors/lattice/blockLatticeRefinementMetricF2D.hh')

diff --git a/src/functors/lattice/blockLatticeRefinementMetricF2D.hh b/src/functors/lattice/blockLatticeRefinementMetricF2D.hh
new file mode 100644
index 0000000..a4ea7e7
--- /dev/null
+++ b/src/functors/lattice/blockLatticeRefinementMetricF2D.hh
@@ -0,0 +1,129 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2018 Adrian Kummerlaender
+ *  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 BLOCK_LATTICE_REFINEMENT_METRIC_F_2D_HH
+#define BLOCK_LATTICE_REFINEMENT_METRIC_F_2D_HH
+
+#include "blockLatticeRefinementMetricF2D.h"
+#include "dynamics/lbHelpers.h"
+
+
+namespace olb {
+
+
+template<typename T, typename DESCRIPTOR>
+BlockLatticeKnudsen2D<T, DESCRIPTOR>::BlockLatticeKnudsen2D(
+  BlockLatticeStructure2D<T, DESCRIPTOR>& blockLattice)
+  : BlockLatticeF2D<T, DESCRIPTOR>(blockLattice, 1)
+{
+  this->getName() = "knudsen";
+}
+
+template<typename T, typename DESCRIPTOR>
+bool BlockLatticeKnudsen2D<T, DESCRIPTOR>::operator()(T output[], const int input[])
+{
+  if (input[0] < 0 || input[1] < 0 || input[0] >= this->_blockLattice.getNx() || input[1] >= this->_blockLattice.getNy()) {
+    return false;
+  }
+
+  const auto& cell = this->_blockLattice.get(input[0], input[1]);
+
+  T rho  = { };
+  T u[2] = { };
+  cell.computeRhoU(rho, u);
+
+  const T uSqr = u[0]*u[0] + u[1]*u[1];
+
+  T sum = 0.;
+
+  for (int iPop = 0; iPop < DESCRIPTOR::q; ++iPop) {
+    const T fEq = olb::lbHelpers<T, DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr);
+
+    sum += std::abs((cell[iPop] - fEq) / (fEq + descriptors::t<T,DESCRIPTOR>(iPop)));
+  }
+
+  output[0] = sum / (DESCRIPTOR::q);
+
+  return true;
+}
+
+
+template<typename T, typename DESCRIPTOR>
+BlockLatticeRefinementMetricKnudsen2D<T, DESCRIPTOR>::BlockLatticeRefinementMetricKnudsen2D(
+  BlockLatticeStructure2D<T, DESCRIPTOR>& blockLattice,
+  const UnitConverter<T, DESCRIPTOR>&     converter)
+  : BlockLatticeKnudsen2D<T, DESCRIPTOR>(blockLattice),
+    _knudsen(converter.getKnudsenNumber())
+{
+  this->getName() = "refinementMetricKnudsen";
+}
+
+template<typename T, typename DESCRIPTOR>
+bool BlockLatticeRefinementMetricKnudsen2D<T, DESCRIPTOR>::operator()(T output[])
+{
+  const std::size_t cellCount = this->_blockLattice.getNx() * this->_blockLattice.getNy();
+
+  T blockSum = 0.;
+
+  T   localOutput[1] = { };
+  int localInput[2]  = { };
+
+  for (localInput[0] = 0; localInput[0] < this->_blockLattice.getNx(); ++localInput[0]) {
+    for (localInput[1] = 0; localInput[1] < this->_blockLattice.getNy(); ++localInput[1]) {
+      BlockLatticeKnudsen2D<T, DESCRIPTOR>::operator()(localOutput, localInput);
+
+      blockSum += localOutput[0];
+    }
+  }
+
+  const T blockC = blockSum / cellCount;
+
+  output[0] = std::nearbyint(std::log2(blockC / _knudsen));
+
+  if ( output[0] <= 0. || blockC <= 0. ) {
+    output[0] = 0.;
+  }
+
+  return true;
+}
+
+template<typename T, typename DESCRIPTOR>
+bool BlockLatticeRefinementMetricKnudsen2D<T, DESCRIPTOR>::operator()(
+  T output[], const int input[])
+{
+  T measuredKnudsen[1] { };
+  BlockLatticeKnudsen2D<T, DESCRIPTOR>::operator()(measuredKnudsen, input);
+
+  output[0] = std::nearbyint(std::log2(measuredKnudsen[0] / _knudsen));
+
+  if ( output[0] <= 0. || measuredKnudsen[0] <= 0. ) {
+    output[0] = 0.;
+  }
+
+  return true;
+}
+
+
+}
+
+#endif
-- 
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