pipe flow with rhoPimpleFoam pressure reflective problem

ztdep · May 3, 2021, 01:01

I solve the problem of air flow in a pipe with the rhopimpleFoam, and i found that the pressure will reflective from the outlet boundary condition back and forth.
I want to know how to resolve this problem. i have tried use trasimissive bc, it still cann't resolve this.

the inlet velocity is 5m/s, and the channle is 20cmby20cm with 2m long.

shock77 · May 3, 2021, 03:29

More informations are needed to be able to help, like boundary conditions or an image of your problem. What fluid is in the pipe? 20 m/s sounds like no density based solver is needed.

May 3, 2021, 01:01	pipe flow with rhoPimpleFoam pressure reflective problem	#1
ztdep Senior Member p ding Join Date: Mar 2009 Posts: 427 Rep Power: 19	I solve the problem of air flow in a pipe with the rhopimpleFoam, and i found that the pressure will reflective from the outlet boundary condition back and forth. I want to know how to resolve this problem. i have tried use trasimissive bc, it still cann't resolve this. the inlet velocity is 5m/s, and the channle is 20cmby20cm with 2m long.

May 3, 2021, 03:29		#2
shock77 Senior Member Join Date: Dec 2019 Posts: 215 Rep Power: 7	More informations are needed to be able to help, like boundary conditions or an image of your problem. What fluid is in the pipe? 20 m/s sounds like no density based solver is needed. dlahaye likes this.

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