From 3d447eb5e493c112682e69e5fcd5c91807fcc7fc Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Wed, 16 Jan 2019 15:06:20 +0100
Subject: Rename example to match its content, extract poiseuille2d

---
 apps/adrian/poiseuille2d/poiseuille2d.cpp | 48 ++++++-------------------------
 1 file changed, 8 insertions(+), 40 deletions(-)

(limited to 'apps/adrian/poiseuille2d/poiseuille2d.cpp')

diff --git a/apps/adrian/poiseuille2d/poiseuille2d.cpp b/apps/adrian/poiseuille2d/poiseuille2d.cpp
index 7112f58..b6c2f52 100644
--- a/apps/adrian/poiseuille2d/poiseuille2d.cpp
+++ b/apps/adrian/poiseuille2d/poiseuille2d.cpp
@@ -37,10 +37,10 @@ typedef double T;
 
 #define DESCRIPTOR D2Q9Descriptor
 
-const T lx  = 8.0;            // length of the channel
-const T ly  = 2.0;            // height of the channel
+const T lx  = 4.0;            // length of the channel
+const T ly  = 1.0;            // height of the channel
 const int N = 50;             // resolution of the model
-const T Re  = 200.;           // Reynolds number
+const T Re  = 100.;           // Reynolds number
 const T baseTau = 0.8;        // Relaxation time of coarsest grid
 const T maxPhysT = 60.;       // max. simulation time in s, SI unit
 const T physInterval = 0.25;  // interval for the convergence check in s
@@ -83,13 +83,6 @@ void prepareGeometry(Grid2D<T,DESCRIPTOR>& grid)
     sGeometry.rename(1,4,outflow);
   }
 
-  // Set material number for vertically centered obstacle
-  {
-    const Vector<T,2> origin {1.25, ly/2};
-    IndicatorCircle2D<T> obstacle(origin, 0.1);
-    sGeometry.rename(1,2,obstacle);
-  }
-
   sGeometry.clean();
   sGeometry.innerClean();
   sGeometry.checkForErrors();
@@ -170,7 +163,7 @@ void getResults(const std::string& prefix,
     vtmWriter.createMasterFile();
   }
 
-  if (iT%20==0) {
+  if (iT%100==0) {
     vtmWriter.write(iT);
   }
 
@@ -195,8 +188,8 @@ int main(int argc, char* argv[])
   Grid2D<T,DESCRIPTOR> coarseGrid(coarseCuboid, N, baseTau, Re);
   prepareGeometry(coarseGrid);
 
-  const Vector<T,2> fineExtend {3.0, 1.5};
-  const Vector<T,2> fineOrigin {0.8, (ly-fineExtend[1])/2};
+  const Vector<T,2> fineExtend {2.0, 0.5};
+  const Vector<T,2> fineOrigin {1.0, (ly-fineExtend[1])/2};
 
   auto& fineGrid = coarseGrid.refine(fineOrigin, fineExtend);
   prepareGeometry(fineGrid);
@@ -221,33 +214,14 @@ int main(int argc, char* argv[])
   sOnLatticeBoundaryCondition2D<T, DESCRIPTOR> fineSBoundaryCondition(fineGrid.getSuperLattice());
   createLocalBoundaryCondition2D<T, DESCRIPTOR>(fineSBoundaryCondition);
 
-  const Vector<T,2> fineExtend2 {0.6, 0.4};
-  const Vector<T,2> fineOrigin2 {1.05, (ly-fineExtend2[1])/2};
-
-  auto& fineGrid2 = fineGrid.refine(fineOrigin2, fineExtend2);
-  prepareGeometry(fineGrid2);
-
-  auto refinedOverlap2 = fineGrid2.getRefinedOverlap();
-  fineGrid.getSuperGeometry().rename(1,0,*refinedOverlap2);
-  fineGrid.getSuperGeometry().rename(2,0,*refinedOverlap2);
-
   prepareLattice(fineGrid, fineBulkDynamics, fineSBoundaryCondition);
 
-  BGKdynamics<T, DESCRIPTOR> fineBulkDynamics2(
-    fineGrid2.getConverter().getLatticeRelaxationFrequency(),
-    instances::getBulkMomenta<T, DESCRIPTOR>());
-
-  sOnLatticeBoundaryCondition2D<T, DESCRIPTOR> fineSBoundaryCondition2(fineGrid2.getSuperLattice());
-  createLocalBoundaryCondition2D<T, DESCRIPTOR>(fineSBoundaryCondition2);
-
-  prepareLattice(fineGrid2, fineBulkDynamics2, fineSBoundaryCondition2);
-
   clout << "starting simulation..." << endl;
   Timer<T> timer(
     coarseGrid.getConverter().getLatticeTime(maxPhysT),
     coarseGrid.getSuperGeometry().getStatistics().getNvoxel());
   util::ValueTracer<T> converge(
-    fineGrid2.getConverter().getLatticeTime(physInterval),
+    fineGrid.getConverter().getLatticeTime(physInterval),
     residuum);
   timer.start();
 
@@ -271,14 +245,8 @@ int main(int argc, char* argv[])
       iT,
       timer,
       converge.hasConverged());
-    getResults(
-      "fine2_",
-      fineGrid2,
-      iT,
-      timer,
-      converge.hasConverged());
 
-    converge.takeValue(fineGrid2.getSuperLattice().getStatistics().getAverageEnergy(), true);
+    converge.takeValue(fineGrid.getSuperLattice().getStatistics().getAverageEnergy(), true);
   }
 
   timer.stop();
-- 
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