[NoradFirst2]

Hello Foamer,

I am simulating a 2D-system which is quite simple using buoyantPimpleFoam

It's a square. I blow air (fixed T and U) coming from the middle of the top side onto the bottom side which is a wall (fixed T). The right and left side plus the rest of the top side are outlets (fixed P0 - BC on T is zeroGradient).

It worked.

Then I removed the outlet parts of the top side to replace them by suction holes (fixed P<P0). These holes are sucking air from my system but also from the outlet (left and right sides) which is normal. The thing is, this air coming from outlet parts is at 0K (because OF doesnt know its temperature I guess) which causes some problems...

Is there a BC which say "I don't know the temperature on this side but if you need to suck air from this side take 298K or internalvalue or current value on the border or whatever but not 0K...". A kind of inletOutlet BC which is fixedValue 298K or zeroGradient depending on the direction of U?

I'll post a drawing for helping you understanding my geometry.

Thanks