Error 1100: Cannot locate flow plane for boundary condition

MFiX
#1

Hello,developers！
I want to implement two planes to pass gas at the same time (bottomominlet to air and CH4inlet to methane), but I encountered the problem in the picture when I operate it, maybe because CH4inlet is the middle interface so I can’t add the boundary condition, but I don’t know how to solve it, can you guys help me to check it?
Thank you very much!

2182115e542854b4fc9948bb49edf13
2182115e542854b4fc9948bb49edf131901×1005 130 KB

experiment .mfx (23.7 KB)
usr_rates.f (4.3 KB)

#2

I am not sure what you mean by “implement two planes to pass gas at the same time”, but you just cannot use CH4Inlet region as a boundary condition. A boundary condition cannot be applied along a plane that has fluid on both sides of the plane. If you want to inject methane without using a BC, you can use a point source instead.