I am running a compressor blade passage simulation in Ansys CFX and wish to use the mass flow outlet boundary condition. I have received a successful run however, when analyzing the solution, I noticed that my velocity profile at the exit appears to be normal with the boundary which should not be the case. I have already looked up in the CFX-Pre User Guide regarding the Mass Flow Exit and it states that "A positive value represents mass flow through the boundary in the specified flow direction. For details, see Flow Direction." The section I am quoting from is section 18.104.22.168. Mass Flow Rate (Bulk Mass Flow Rate for Muliphase). The section it suggested to reference for details sent me to information on the flow direction specified in the inlet.
Is the flow direction for a mass flow exit tied to the flow direction of the inlet, or is there a way to specify the flow direction for an exit mass flow rate boundary condition? It may also be possible that I am looking in the wrong section of the CFX-Pre User Guide. Any guidance will help.