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Problems in immersedboundary method using icoIbFoam in of-extend4.0

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Old   July 13, 2017, 09:28
Default Problems in immersedboundary method using icoIbFoam in of-extend4.0
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Dong Zhang
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I want to simluate a flow around Naca0012 foil using IB method in of-extend-4.0. The case is 2D and the Z direction length of the mesh is same with the Naca foil in the .stl file. When I run potentialIbFoam, it encounters "Intersection point is not on symmetry plane ".

In the immersedBoundaryFvPatch.C at line 1053, it says

if
(
mesh_.nGeometricD() < 3
&& mag(ibCellCentres[cellI].z() - ibPoints[cellI].z()) > SMALL
)
{
WarningIn
(
"immersedBoundaryFvPatch::makeIbPointsAndNorma ls() const"
) << "Intersection point is not on symmetry plane " << nl
<< "C = " << ibCellCentres[cellI]
<< " D = " << ibPoints[cellI] << nl
<< "for 2-D geometry. Adjusting" << endl;

But some of the ibCellCentres[cellI].z() = ibPoints[cellI].z() =0.05 in my case. Can you give me some help? Thank you very much!

Create time

Create mesh for time = 0


SIMPLE: no convergence criteria found. Calculations will run for 3 steps.

Create immersed boundary cell mask
Create immersed boundary face mask
Found immersed boundary patch 0 named ibCylinder
External flow
Number of IB cells: 774
Reading field p

Reading field U


Calculating potential flow
--> FOAM Warning :
From function immersedBoundaryFvPatch::makeIbPointsAndNormals() const
in file immersedBoundaryFvPatch/immersedBoundaryFvPatch.C at line 1053
Intersection point is not on symmetry plane
C = (-9.14326e-06 -0.00767303 0.05) D = (0.00163822 -0.00699302 0.0500001)
for 2-D geometry. Adjusting
--> FOAM Warning :
From function immersedBoundaryFvPatch::makeIbPointsAndNormals() const
in file immersedBoundaryFvPatch/immersedBoundaryFvPatch.C at line 1053
Intersection point is not on symmetry plane
C = (-9.14326e-06 -0.00461139 0.05) D = (0.000689702 -0.00444315 0.05)
for 2-D geometry. Adjusting
--> FOAM Warning :
From function immersedBoundaryFvPatch::makeIbPointsAndNormals() const
in file immersedBoundaryFvPatch/immersedBoundaryFvPatch.C at line 1053
Intersection point is not on symmetry plane
C = (-9.14326e-06 -0.00154975 0.05) D = (0.000139054 -0.00153711 0.05)
for 2-D geometry. Adjusting
......
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