CFDesign CFD module

hugocis · January 3, 2013, 12:02

Does anybody know how to simulate a cooling system of a bus using autodesk CFD soft? I am having serious problems modeling the heat exchangers which are evaporators in my case. I can provide pictures or CAD files if needed.
Thanks you

Mithrandir · January 8, 2013, 16:30

are you trying to simulate the flow through the heat exchangers?

if you are looking for a overall "Macro" solution... use a distributed resistance for the Hx..... try to get a pressure drop curve vs flow rate from the Hx vendor.... if it is a decent Hx.. at sea level.. you could prolly use a 2 inch of H2O pressure drop at all flow rates....(Velocities)

hugocis · January 9, 2013, 04:14

Thank you for your reply. What i have done is to define those exchangers as volumic BC with a negative total heat generation. What do you think of that? i haven't have results yet...

marktm250xc · January 11, 2013, 10:45

Yes, you could apply a negative heat generation. 2013 added a new heat exchanger material with more options. Go to the Autodesk Help wiki and search for heat exchanger materials.

January 3, 2013, 12:02	CFDesign CFD module	#1
hugocis New Member Francis Join Date: Apr 2010 Posts: 13 Rep Power: 16	Does anybody know how to simulate a cooling system of a bus using autodesk CFD soft? I am having serious problems modeling the heat exchangers which are evaporators in my case. I can provide pictures or CAD files if needed. Thanks you

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January 8, 2013, 16:30		#2
Mithrandir New Member Mike Stroup Join Date: Sep 2011 Posts: 13 Rep Power: 15	are you trying to simulate the flow through the heat exchangers? if you are looking for a overall "Macro" solution... use a distributed resistance for the Hx..... try to get a pressure drop curve vs flow rate from the Hx vendor.... if it is a decent Hx.. at sea level.. you could prolly use a 2 inch of H2O pressure drop at all flow rates....(Velocities)

January 9, 2013, 04:14		#3
hugocis New Member Francis Join Date: Apr 2010 Posts: 13 Rep Power: 16	Thank you for your reply. What i have done is to define those exchangers as volumic BC with a negative total heat generation. What do you think of that? i haven't have results yet...

January 11, 2013, 10:45		#4
marktm250xc New Member Mark Decker Join Date: Jan 2013 Location: Central Virginia Posts: 21 Rep Power: 13	Yes, you could apply a negative heat generation. 2013 added a new heat exchanger material with more options. Go to the Autodesk Help wiki and search for heat exchanger materials.