{ // Setting pressure on solid patch Info << "Setting pressure" << endl; scalarField solidPatchPressure = interpolatorFluidSolid.faceInterpolate ( p.boundaryField()[fluidPatchID] ); solidPatchPressure *= rhoFluid.value(); tForce.pressure() = solidPatchPressure; vector totalPressureForce = sum ( p.boundaryField()[fluidPatchID]* mesh.Sf().boundaryField()[fluidPatchID] ); Info << "Total pressure force = " << totalPressureForce << endl; }