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Hi, 

I hope everyone is taking precautions against the COVID-19 threat. 

This is regarding a problem I am facing in a coupled simulation. I am using Acoustic solver in nektar-5 with CWIPI- coupling. The source terms (fluctuating lamb vector) are sent via Openfoam. I am trying to see acoustics due to flow past a cylinder as a test case for the coupling. The lamb vector at the surface of the cylinder is zero (because the velocity is zero due to no slip boundary condition). However, when i try to visualize the force terms in nektar, it displays an unusually high value at the cylinder wall. 
Further, the base fields are also received from Openfoam. The mean velocities should vanish at the cylinder wall(they are indeed zero in OpenFoam) . But the values are non zero when they are received in nektar. 

I guess (and correct me if I am wrong) the source of this error is the interpolation from a finite volume grid to spectral grid and the fact that boundary conditions are not satisfied for base fields and source terms. 

Is there any way by which I can ensure that the base fields as well as the source terms are zero at the solid boundary? 


Sincerely, 
Nitish