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Boundary condition error in immersedBoundary

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Old   June 10, 2023, 11:06
Question Boundary condition error in immersedBoundary
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Thomas Shi
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Hi,Foamers!
I am struggling with a boundary condition problem in simulating turbulence flow in foam-extend 4.0 with immersed boundary method. The message reminded that a vector tauWall was not set for the IB patch for field U. Does anyone know how to solve this problem? Thank you in advance!
Code:
--> FOAM FATAL ERROR:
tauWall not set for IB patch ibCylinder for field U

    From function const vectorField& immersedBoundaryVelocityWallFunctionFvPatchVectorField::wallShearStress() const
    in file wallFunctions/immersedBoundaryVelocityWallFunctions/immersedBoundaryVelocityWallFunctionFvPatchVectorField.C at line 200.

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