Boundary condition error in immersedBoundary -- CFD Online Discussion Forums

June 10, 2023, 12:06	Boundary condition error in immersedBoundary	#1
ThomasLong New Member Thomas Shi Join Date: Jan 2018 Posts: 20 Rep Power: 8	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. FOAM aborting Aborted

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