code_saturne User's Forum

Hello,

Now, I am trying to scalar transport simulation.
I impose "1.0" of "Prescribed Value" for inlet condition, and "0.0 (zero)" of "Prescribed (outgoing) flux" for outlet condition.

Here I am wondering that what is "Prescribed (outgoing) flux" for outlet condition.
If I define zero flux for "species for backflow" at outlet, is outlet boundary equal to free outlet condition (or wall condition)? I just want scalar to come from inlet and go out from outlet boundary. So it is just no gradient for scalar concentration.

Best regards,
Tsubasa

Hello,

I think the value given in the GUI is used only if the fluid comes back in the outlet (so should be more logical for free inlet/outlet than outlet). It may also affect the diffusive term. You can simply leave it at 0.

Best regards,

Yvan