Simulate a fan inside a larger domain

gregoire · April 4, 2011, 12:55

Hello,
Is it possible to create an inside boundary in fluent in order to simulate a fan behind a radiator in a car for example. I would like to set a flow rate to a small zone of my domain, can it be done?
Thx for your help.

Greg

Amir · April 4, 2011, 17:19

Hi,
yes, it can be done with implementation of fixed values in FLUENT, here you can set conditions on special cells like their velocities, in other words you can set volume conditions!

xrs333 · April 4, 2011, 18:00

Quote:

Originally Posted by gregoire

Hello,
Is it possible to create an inside boundary in fluent in order to simulate a fan behind a radiator in a car for example. I would like to set a flow rate to a small zone of my domain, can it be done?
Thx for your help.

Greg

If you are not focusing on details of the flow near the fan itself, but the bulk flow, the 'fan' model is pertinent.

gregoire · April 5, 2011, 11:53

Thx for your help. I will try first by setting a constant velocity to part of the domain because I don't really have the data to set the jump in pressure asked for the fan condition.

Sushilkumar · April 6, 2011, 01:58

have you thought whether momentum source can be used in this case..?

gregoire · April 6, 2011, 03:45

No not really but setting a velocity to the fan zone works pretty well and for my use it is more than enough.

asal · June 21, 2013, 11:10

Hello!

dear gregoire, do you find any solution for your case? I have the same problem.
how do you set a velocity to the fan zone?
thanks.

gregoire · June 21, 2013, 12:42

Hello Asal,
As I explain before I set a velocity to part of the volume. It has been a while but I think I created a surface in the CAD model which gave me the possibility to set velocity conditions on that surface in fluent.
The trick is to be able to have cells which follow your conditions.
Hope it helps.

Gregoire

asal · June 21, 2013, 13:04

Hello and thanks for your reply.

But then you need the flow properties in that area such as temperature and so on.
how you find the flow properties in that surface?

see here please:
http://www.cfd-online.com/Forums/flu...de-domain.html

April 4, 2011, 12:55	Simulate a fan inside a larger domain	#1
gregoire New Member Join Date: Mar 2011 Posts: 8 Rep Power: 15	Hello, Is it possible to create an inside boundary in fluent in order to simulate a fan behind a radiator in a car for example. I would like to set a flow rate to a small zone of my domain, can it be done? Thx for your help. Greg XJTH likes this.

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April 4, 2011, 17:19		#2
Amir Senior Member Amir Join Date: May 2009 Location: Montreal, QC Posts: 735 Blog Entries: 1 Rep Power: 23	Hi, yes, it can be done with implementation of fixed values in FLUENT, here you can set conditions on special cells like their velocities, in other words you can set volume conditions!

April 5, 2011, 11:53		#4
gregoire New Member Join Date: Mar 2011 Posts: 8 Rep Power: 15	Thx for your help. I will try first by setting a constant velocity to part of the domain because I don't really have the data to set the jump in pressure asked for the fan condition.

April 6, 2011, 01:58		#5
Sushilkumar Member Join Date: Apr 2009 Location: Pune Posts: 37 Rep Power: 17	have you thought whether momentum source can be used in this case..?

April 6, 2011, 03:45		#6
gregoire New Member Join Date: Mar 2011 Posts: 8 Rep Power: 15	No not really but setting a velocity to the fan zone works pretty well and for my use it is more than enough.

June 21, 2013, 11:10		#7
asal Senior Member Astio Lamar Join Date: May 2012 Location: Pipe Posts: 186 Rep Power: 14	Hello! dear gregoire, do you find any solution for your case? I have the same problem. how do you set a velocity to the fan zone? thanks.

June 21, 2013, 12:42		#8
gregoire New Member Join Date: Mar 2011 Posts: 8 Rep Power: 15	Hello Asal, As I explain before I set a velocity to part of the volume. It has been a while but I think I created a surface in the CAD model which gave me the possibility to set velocity conditions on that surface in fluent. The trick is to be able to have cells which follow your conditions. Hope it helps. Gregoire

June 21, 2013, 13:04		#9
asal Senior Member Astio Lamar Join Date: May 2012 Location: Pipe Posts: 186 Rep Power: 14	Hello and thanks for your reply. But then you need the flow properties in that area such as temperature and so on. how you find the flow properties in that surface? see here please: http://www.cfd-online.com/Forums/flu...de-domain.html