||August 30, 2011 01:32
Uniform pressue increase over fan
I'm modeling a closed-circiut windtunnel in ANSYS CFX v13 and am using an interface in CFX-Pre to simulate the fan in the tunnel. I.e I have ha fluid fluid interface with general connection between the two adjacent faces that is supposed to be the fan. Under "Additional Interface Models" I've selected Conservative Interface Flux and a pressure change of 450 Pa. In this simulation I'll neglect the vortices caused by the fan so I want a uniform flow out of the fan.
My problem is that when I do it this way I get a pressure gradient in the cross section of the fan since the flow before the fan isn't uniform and the interface just increases the pressure at each point by 450 Pa (I guess?). Does anyone have any idea about how I can make the flow out of the fan uniform?