Cannot locate flow plane for boundary condition

MFiX
,
#1

Hello,developers！
I have a problem with Cannot locate flow plane for boundary condition when running the following case,I did some research and found that it seems to be the normals, I tried to adjust the Flip normals but it didn’t work, can you help me with this?
Looking forward to any possible answers, thanks!

92cfa62f7e3040334beb3b0aceb0eb7
92cfa62f7e3040334beb3b0aceb0eb7785×420 8.88 KB

OCAC CH4-wenxian.mfx (25.7 KB)
usr_rates.f (4.1 KB)
usr_rates_des.f (7.4 KB)

#2

First, please make sure you check the “Flip normals” box when you apply the filter:

image
image1651×726 100 KB

Next, the issue is the mass inlet is on top of the pressure outlet. Here you should split the pressure outlet BC in 4 regions that surround the mass inlet so the BCs don’t overlap.

The top mass inlet should also have a negative y-velocity component.