I’m trying to understand the Python sample script of flow around a cylinder. I noticed that the outflow boundary condition is copying the unknown dist. functions of the back neighbor:
i1 = arange(q)[asarray([ci<0 for ci in c])] # Unknown on right wall.
[code="python"] fin[i1,-1,:] = fin[i1,-2,:] # Right wall: outflow condition.
Could anyone tell me the name of this boundary condition?
Thanks in advance.