how to set BC for compressible flow target mass flow rate

foolboy007 · April 3, 2012, 16:12

I have a T shaped geometry. One inlet and two outlets.
Total flow rate is 500 slpm. The flow ratio for the outlets is 9:1.
I am using compressible flow to solve the flow.

inlet: mass flow intlet
outlet: pressure outlet with target mass flow rate turned on.

However,after 100k iterations, I still cannot get expected mass flow rate through the two outlets.

Could anybody give me some suggestions about this?

Zigainer · April 4, 2012, 03:24

I also had problems with pressure outlet and traget mass flow rate (see http://www.cfd-online.com/Forums/flu...flow-rate.html)

and here is how fluent does it:
https://www.sharcnet.ca/Software/Flu...ug/node244.htm

In your case I would just use pressure outlet without traget mass flow rate and adjust the gauge pressure until you get your mass flow rate

April 3, 2012, 16:12	how to set BC for compressible flow target mass flow rate	#1
foolboy007 New Member Guan Join Date: Dec 2011 Location: US Posts: 25 Rep Power: 14	I have a T shaped geometry. One inlet and two outlets. Total flow rate is 500 slpm. The flow ratio for the outlets is 9:1. I am using compressible flow to solve the flow. inlet: mass flow intlet outlet: pressure outlet with target mass flow rate turned on. However,after 100k iterations, I still cannot get expected mass flow rate through the two outlets. Could anybody give me some suggestions about this?

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April 4, 2012, 03:24		#2
Zigainer Senior Member Join Date: May 2011 Location: Germany Posts: 130 Rep Power: 14	I also had problems with pressure outlet and traget mass flow rate (see http://www.cfd-online.com/Forums/flu...flow-rate.html) and here is how fluent does it: https://www.sharcnet.ca/Software/Flu...ug/node244.htm In your case I would just use pressure outlet without traget mass flow rate and adjust the gauge pressure until you get your mass flow rate