How to simulate a fan inside a domain

asal · June 21, 2013, 10:16

Hello every body.

I have two pipe within my geometry. The airflow was supplied over the inlet 1 and extracted out by outlet 1.
There is a fan in the inner pipe which suck the flow in the inner pipe from outlet 2 and extracted to the main pipe from outlet 2. the flow can pass also from the gap between the shell of inner/outer pipes. How can I specify the boundary condition of inlet/outlet 2? Note that we have no any flow properties at the inlet/outlet 2 except velocity.
I think it is possible to do it with fan-zone, but I cannot find any example for it.
I am appropriate if someone can give me a hand in the case.

Thanks.

Far · June 23, 2013, 07:52

Use fan condition and specify pressure jump. Be careful in selecting sign for pressure jump.

asal · June 23, 2013, 11:31

I did it already. the problem is the flow is pass throw the walls which I specify to the boundaries around the fan zone. I want flow just passing throw the inlet, outlet of the fan zone, not the walls.
do you have any solution for this issue?

June 21, 2013, 10:16	How to simulate a fan inside a domain	#1
asal Senior Member Astio Lamar Join Date: May 2012 Location: Pipe Posts: 186 Rep Power: 14	Hello every body. I have two pipe within my geometry. The airflow was supplied over the inlet 1 and extracted out by outlet 1. There is a fan in the inner pipe which suck the flow in the inner pipe from outlet 2 and extracted to the main pipe from outlet 2. the flow can pass also from the gap between the shell of inner/outer pipes. How can I specify the boundary condition of inlet/outlet 2? Note that we have no any flow properties at the inlet/outlet 2 except velocity. I think it is possible to do it with fan-zone, but I cannot find any example for it. I am appropriate if someone can give me a hand in the case. Thanks. Last edited by asal; June 23, 2013 at 11:33.

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June 23, 2013, 07:52		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Use fan condition and specify pressure jump. Be careful in selecting sign for pressure jump.

June 23, 2013, 11:31		#3
asal Senior Member Astio Lamar Join Date: May 2012 Location: Pipe Posts: 186 Rep Power: 14	I did it already. the problem is the flow is pass throw the walls which I specify to the boundaries around the fan zone. I want flow just passing throw the inlet, outlet of the fan zone, not the walls. do you have any solution for this issue?