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authorAdrian Kummerlaender2019-01-21 12:35:10 +0100
committerAdrian Kummerlaender2019-06-24 15:17:09 +0200
commit80e945199941d2c80ef8ff6016f4406f3b37869c (patch)
treeb82fda3c856ae72da7f3f23c7c7f3b6cb2f1aa25
parent6e9ee22dc5806b542b07bb93a700ece408d03c48 (diff)
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Setup geometry relative to cylinder diameter
-rw-r--r--apps/adrian/cylinder2d/cylinder2d.cpp48
1 files changed, 25 insertions, 23 deletions
diff --git a/apps/adrian/cylinder2d/cylinder2d.cpp b/apps/adrian/cylinder2d/cylinder2d.cpp
index 33028c0..3baa4ef 100644
--- a/apps/adrian/cylinder2d/cylinder2d.cpp
+++ b/apps/adrian/cylinder2d/cylinder2d.cpp
@@ -37,12 +37,16 @@ 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 int N = 100; // resolution of the model
-const T Re = 1000.; // Reynolds number
-const T baseTau = 0.52; // Relaxation time of coarsest grid
-const T maxPhysT = 120.; // max. simulation time in s, SI unit
+/// Setup geometry relative to cylinder diameter as defined by [SchaeferTurek96]
+const T cylinderD = 1.0;
+
+const int N = 10; // resolution of the model
+const T lx = 22 * cylinderD; // length of the channel
+const T ly = 4.1 * cylinderD; // height of the channel
+const T Re = 100.; // Reynolds number
+const T uLat = 0.00333; // lattice velocity (also used as inflow velocity)
+const T maxPhysT = 120.; // max. simulation time in s, SI unit
+
void prepareGeometry(Grid2D<T,DESCRIPTOR>& grid)
{
@@ -58,8 +62,8 @@ void prepareGeometry(Grid2D<T,DESCRIPTOR>& grid)
// Set material number for bounce back boundaries
{
- const Vector<T,2> wallExtend {lx+physSpacing, physSpacing/2};
- const Vector<T,2> wallOrigin {-physSpacing/4, -physSpacing/4};
+ const Vector<T,2> wallExtend {lx+physSpacing, physSpacing};
+ const Vector<T,2> wallOrigin {-physSpacing/2, -physSpacing/2};
IndicatorCuboid2D<T> lowerWall(wallExtend, wallOrigin);
sGeometry.rename(1,2,lowerWall);
@@ -82,8 +86,8 @@ void prepareGeometry(Grid2D<T,DESCRIPTOR>& grid)
// Set material number for vertically centered cylinder
{
- const Vector<T,2> origin {1.25, ly/2};
- IndicatorCircle2D<T> obstacle(origin, 0.2);
+ const Vector<T,2> origin {2*cylinderD, 2*cylinderD};
+ IndicatorCircle2D<T> obstacle(origin, cylinderD/2);
sGeometry.rename(1,2,obstacle);
}
@@ -108,19 +112,20 @@ void prepareLattice(Grid2D<T,DESCRIPTOR>& grid,
const T omega = converter.getLatticeRelaxationFrequency();
- sLattice.defineDynamics(sGeometry, 0, &instances::getNoDynamics<T, DESCRIPTOR>());
+ sLattice.defineDynamics(sGeometry, 0, &instances::getNoDynamics<T,DESCRIPTOR>());
sLattice.defineDynamics(sGeometry, 1, &bulkDynamics); // bulk
- sLattice.defineDynamics(sGeometry, 2, &instances::getBounceBack<T, DESCRIPTOR>());
+ sLattice.defineDynamics(sGeometry, 2, &instances::getNoDynamics<T,DESCRIPTOR>());
sLattice.defineDynamics(sGeometry, 3, &bulkDynamics); // inflow
sLattice.defineDynamics(sGeometry, 4, &bulkDynamics); // outflow
+ sBoundaryCondition.addVelocityBoundary(sGeometry, 2, omega);
sBoundaryCondition.addVelocityBoundary(sGeometry, 3, omega);
sBoundaryCondition.addPressureBoundary(sGeometry, 4, omega);
AnalyticalConst2D<T,T> rho0(1.0);
AnalyticalConst2D<T,T> u0(0.0, 0.0);
- auto materials = sGeometry.getMaterialIndicator({1, 3, 4});
+ auto materials = sGeometry.getMaterialIndicator({1, 2, 3, 4});
sLattice.defineRhoU(materials, rho0, u0);
sLattice.iniEquilibrium(materials, rho0, u0);
@@ -135,13 +140,10 @@ void setBoundaryValues(Grid2D<T,DESCRIPTOR>& grid, int iT)
auto& sGeometry = grid.getSuperGeometry();
auto& sLattice = grid.getSuperLattice();
- const int iTmaxStart = converter.getLatticeTime(0.1 * maxPhysT);
- const int iTupdate = 50;
+ const int iTmaxStart = converter.getLatticeTime(0.05 * maxPhysT);
+ const int iTupdate = 20;
if ( iT % iTupdate == 0 && iT <= iTmaxStart ) {
- OstreamManager clout(std::cout,"setBoundaryValues");
- clout << "Update inflow." << std::endl;
-
PolynomialStartScale<T,T> StartScale(iTmaxStart, 1.0);
T iTvec[1] { T(iT) };
@@ -204,11 +206,11 @@ int main(int argc, char* argv[])
const Vector<T,2> coarseExtend {lx, ly};
IndicatorCuboid2D<T> coarseCuboid(coarseExtend, coarseOrigin);
- Grid2D<T,DESCRIPTOR> coarseGrid(coarseCuboid, N, RelaxationTime<T>(baseTau), Re);
+ Grid2D<T,DESCRIPTOR> coarseGrid(coarseCuboid, N, LatticeVelocity<T>(uLat), 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 {10*cylinderD, 2.75*cylinderD};
+ const Vector<T,2> fineOrigin {0.75*cylinderD, (ly-fineExtend[1])/2};
auto& fineGrid = coarseGrid.refine(fineOrigin, fineExtend);
prepareGeometry(fineGrid);
@@ -233,8 +235,8 @@ int main(int argc, char* argv[])
sOnLatticeBoundaryCondition2D<T, DESCRIPTOR> fineSBoundaryCondition(fineGrid.getSuperLattice());
createLocalBoundaryCondition2D<T, DESCRIPTOR>(fineSBoundaryCondition);
- const Vector<T,2> fineExtend2 {1.2, 0.8};
- const Vector<T,2> fineOrigin2 {0.95, (ly-fineExtend2[1])/2};
+ const Vector<T,2> fineExtend2 {5*cylinderD, 1.5*cylinderD};
+ const Vector<T,2> fineOrigin2 {1.25*cylinderD, (ly-fineExtend2[1])/2};
auto& fineGrid2 = fineGrid.refine(fineOrigin2, fineExtend2);
prepareGeometry(fineGrid2);