airfan in duct

jlewenko · July 22, 2011, 04:18

Hi,

I have the duct with centrifugal fan. Could You help me how to take the fan into account without modelling the fan?

Best regards

Jaroslaw

abdul099 · August 7, 2011, 15:10

Create a region where the fan should be and assign an appropriate momentum source to that region.

jlewenko · August 7, 2011, 15:55

HI,

Thanks for Your reply. What You mean by momentum source?

Best regards

PS. I founded. But it is only available for axis fans? What with centrifugal fans?

abdul099 · August 8, 2011, 17:21

A momentum source should be independent from the design of the fan. It just adds a source for additional momentum to the momentum equations. Of course, this is just a simplification, but can often be used to take the effects of a fan into account without having to model the fan itself.

July 22, 2011, 04:18	airfan in duct	#1
jlewenko New Member Join Date: Apr 2011 Posts: 3 Rep Power: 14	Hi, I have the duct with centrifugal fan. Could You help me how to take the fan into account without modelling the fan? Best regards Jaroslaw

August 7, 2011, 15:55		#3
jlewenko New Member Join Date: Apr 2011 Posts: 3 Rep Power: 14	HI, Thanks for Your reply. What You mean by momentum source? Best regards PS. I founded. But it is only available for axis fans? What with centrifugal fans? Last edited by jlewenko; August 7, 2011 at 16:14.

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August 7, 2011, 15:10		#2
abdul099 Senior Member Join Date: Oct 2009 Location: Germany Posts: 636 Rep Power: 21	Create a region where the fan should be and assign an appropriate momentum source to that region.

August 8, 2011, 17:21		#4
abdul099 Senior Member Join Date: Oct 2009 Location: Germany Posts: 636 Rep Power: 21	A momentum source should be independent from the design of the fan. It just adds a source for additional momentum to the momentum equations. Of course, this is just a simplification, but can often be used to take the effects of a fan into account without having to model the fan itself.