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[CAP_NJ]

Hi CFD_Friend,

thanks a lot for your answer!!! I tried a lot a of ways to calculate the force (even the way you mentioned). In the end the problem was, that I have had set the option "include reference pressure" to "t" (true?) in CFX. In my understandng I would expect the force would be defined as shown on the figure above, just like in fluent, but it was different. I still had to define the relative pressure (pt_inlet-p_ref) at the inlet and outlet (p_outlet-p_ref). It does not make sense to me, but it works like that.

Thanks again and best regards!