Transpiration b.c.
 

Hi. New to SU2. Trying to model bleed and blowing, and wanted to use the transpiration boundary condition. How do you do this in SU2? Assume specific marker for the boundary/wall in the cfg file, but what is the exact command and arguments. Searched around github, but can't find anything with the transpiration implementation details. Thx.

Hi,


I have to admit I am not sure what a transpiration BC is. If you could quickly explain or give a reference to what you have in mind that would help. Also in which context are you using that.



Searching through the code-base revealed no hits for "transpiration" and I also never saw that. So I guess it is not present. But it is usually not too difficult to code up a boundary condition yourself. If you are interested in doing that please let me know.


Best, Tobi

Hi,


I guess you mean a (semi) permeable or porous wall, where a certain amount of flow passes through the wall, either naturally or forced. This would mean either having a wall with a nonzero normal velocity or some modified surface velocity gradient based on Darcy's law. In any case we do not have such a boundary condition right now. As Tobi said, if you can be more specific then we can help you .

Yes. I mean permeable wall b.c. to pass mass flow across the surface wall. For example, mass out from wall (remove from flow surface) to simulate bleed/suction (i.e. to remove low momentum boundary layer).

Hi, have you made any progress with the new boundary condition? I am planning to do the same but I have not been very successful yes. I was trying to make a kind of merge between the Inlet/Outlet and the constant temperature wall boundary condition. I have not really been succesfull at the moment. As a test case for testing the effect of the BC I am using the laminar compressible boundary layer.