Cheng Peng

Hi Rob, thanks for your reply. I understand the streamlines don't mix now. I have a udf to describle the flowrate in the inlet 1, and I want to use the same waveform but different amplitued to push the inlet 1 back. This model is used in cerebral artery, the inlet 2 is the graft to cut the inlet 1's normal blood flow. What boundary condition should I set?