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authorAdrian Kummerlaender2019-03-22 22:25:48 +0100
committerAdrian Kummerlaender2019-06-24 15:18:01 +0200
commit3edd576b152ec5df907597fb1a24d3e570d31f72 (patch)
tree8e277cbadf9f156803c95f9c9c45f5eac64ba259
parent434c888eef53c4152cd99922a4a65df79ac0b2aa (diff)
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Slightly shift cylinder relative to finest grid
This removes the "Bogus distance" warnings that are otherwise generated by `addZeroVelocityBoundary`.
-rw-r--r--apps/adrian/cylinder2d/common/model.h34
1 files changed, 17 insertions, 17 deletions
diff --git a/apps/adrian/cylinder2d/common/model.h b/apps/adrian/cylinder2d/common/model.h
index 124a1df..02e15e8 100644
--- a/apps/adrian/cylinder2d/common/model.h
+++ b/apps/adrian/cylinder2d/common/model.h
@@ -30,7 +30,7 @@ const T deltaR = cylinderD / N; // coarse lattice spacing
const Vector<T,2> modelOrigin {0.0, 0.0};
const Vector<T,2> modelExtend {22*cylinderD + deltaR, 4.1*cylinderD + deltaR};
-const Vector<T,2> cylinderCenter {2*cylinderD, 2*cylinderD + deltaR/2};
+const Vector<T,2> cylinderCenter {2*cylinderD, 2*cylinderD};
void prepareGeometry(Grid2D<T,DESCRIPTOR>& grid, Vector<T,2> origin, Vector<T,2> extend)
{
@@ -78,7 +78,7 @@ void prepareGeometry(Grid2D<T,DESCRIPTOR>& grid, Vector<T,2> origin, Vector<T,2>
// Set material number for vertically centered cylinder
{
- const Vector<T,2> cylinderOrigin = origin + Vector<T,2> {cylinderCenter[0], cylinderCenter[1]};
+ const Vector<T,2> cylinderOrigin = origin + Vector<T,2> {cylinderCenter[0], cylinderCenter[1]+physSpacing/2};
IndicatorCircle2D<T> obstacle(cylinderOrigin, cylinderD/2);
sGeometry.rename(1,5,obstacle);
}
@@ -99,6 +99,8 @@ void prepareLattice(Grid2D<T,DESCRIPTOR>& grid)
auto& sGeometry = grid.getSuperGeometry();
auto& sLattice = grid.getSuperLattice();
+ const T physSpacing = converter.getPhysDeltaX();
+
Dynamics<T,DESCRIPTOR>& bulkDynamics = grid.addDynamics(
std::unique_ptr<Dynamics<T,DESCRIPTOR>>(
new BGKdynamics<T,DESCRIPTOR>(
@@ -108,31 +110,26 @@ void prepareLattice(Grid2D<T,DESCRIPTOR>& grid)
sOnLatticeBoundaryCondition2D<T,DESCRIPTOR>& sBoundaryCondition = grid.getOnLatticeBoundaryCondition();
createLocalBoundaryCondition2D<T,DESCRIPTOR>(sBoundaryCondition);
- const T omega = converter.getLatticeRelaxationFrequency();
+ sOffLatticeBoundaryCondition2D<T,DESCRIPTOR>& sOffBoundaryCondition = grid.getOffLatticeBoundaryCondition();
+ createBouzidiBoundaryCondition2D<T,DESCRIPTOR>(sOffBoundaryCondition);
sLattice.defineDynamics(sGeometry, 0, &instances::getNoDynamics<T,DESCRIPTOR>());
sLattice.defineDynamics(sGeometry, 1, &bulkDynamics); // bulk
sLattice.defineDynamics(sGeometry, 2, &bulkDynamics); // walls
sLattice.defineDynamics(sGeometry, 3, &bulkDynamics); // inflow
sLattice.defineDynamics(sGeometry, 4, &bulkDynamics); // outflow
+ sLattice.defineDynamics(sGeometry, 5, &instances::getNoDynamics<T,DESCRIPTOR>());
- // only set zero velocity boundary if cylinder covered by the grid
- if (sGeometry.getStatistics().getNvoxel(5) > 0) {
- sLattice.defineDynamics(sGeometry, 5, &instances::getNoDynamics<T,DESCRIPTOR>());
-
- sOffLatticeBoundaryCondition2D<T,DESCRIPTOR> sOffBoundaryCondition = grid.getOffLatticeBoundaryCondition();
- createBouzidiBoundaryCondition2D<T,DESCRIPTOR>(sOffBoundaryCondition);
-
- const Vector<T,2> cylinderOrigin {cylinderCenter[0], cylinderCenter[1]};
- IndicatorCircle2D<T> obstacle(cylinderOrigin, cylinderD/2);
-
- sOffBoundaryCondition.addZeroVelocityBoundary(sGeometry, 5, obstacle);
- }
+ const T omega = converter.getLatticeRelaxationFrequency();
sBoundaryCondition.addVelocityBoundary(sGeometry, 2, omega);
sBoundaryCondition.addVelocityBoundary(sGeometry, 3, omega);
sBoundaryCondition.addPressureBoundary(sGeometry, 4, omega);
+ const Vector<T,2> cylinderOrigin {cylinderCenter[0], cylinderCenter[1]+physSpacing/2};
+ IndicatorCircle2D<T> obstacle(cylinderOrigin, cylinderD/2);
+ sOffBoundaryCondition.addZeroVelocityBoundary(sGeometry, 5, obstacle);
+
AnalyticalConst2D<T,T> rho0(1.0);
AnalyticalConst2D<T,T> u0(0.0, 0.0);
@@ -143,6 +140,7 @@ void prepareLattice(Grid2D<T,DESCRIPTOR>& grid)
sLattice.initialize();
clout << "Prepare lattice ... OK" << std::endl;
+ sGeometry.print();
}
void setBoundaryValues(Grid2D<T,DESCRIPTOR>& grid, int iT)
@@ -201,14 +199,16 @@ void takeMeasurements(Grid2D<T,DESCRIPTOR>& grid, int iT, bool print=true)
auto& sGeometry = grid.getSuperGeometry();
auto& converter = grid.getConverter();
+ const T physSpacing = converter.getPhysDeltaX();
+
SuperLatticePhysPressure2D<T,DESCRIPTOR> pressure(sLattice, converter);
AnalyticalFfromSuperF2D<T> intpolatePressure(pressure, true);
SuperLatticePhysDrag2D<T,DESCRIPTOR> dragF(sLattice, sGeometry, 5, converter);
const T radiusCylinder = cylinderD/2;
- const T point1[2] { cylinderCenter[0] - radiusCylinder, cylinderCenter[1] };
- const T point2[2] { cylinderCenter[0] + radiusCylinder, cylinderCenter[1] };
+ const T point1[2] { cylinderCenter[0] - radiusCylinder, cylinderCenter[1]+physSpacing/2 };
+ const T point2[2] { cylinderCenter[0] + radiusCylinder, cylinderCenter[1]+physSpacing/2 };
T pressureInFrontOfCylinder, pressureBehindCylinder;
intpolatePressure(&pressureInFrontOfCylinder, point1);