volumetric heat source

March 29, 2004, 05:32

Hi everbody!

I have to model a simple fire, that in other cfd code was set as a volumetric heat source. Does CFX 5.6 have this feature?(i was looking in help and i coudn't find something about this). Thank a lot, ioana

March 29, 2004, 19:40

Hi ioana,

Yes, CFX5 has volumetric heat sources.

Glenn

azhao · March 11, 2014, 14:13

Is this volumetric heat source linearly distributed in the fluid domain?
Or this heat source term is each cell based, the value depending on the cell velocity or flow rate?
Thanks!

ghorrocks · March 11, 2014, 18:06

There are not many people still around after 10 years but I am still here. A bit older and crustier but still here.

You can define a volumetric heat source as constant or as a function of just about anything. So it can be set per control volume if you want to.

azhao · March 11, 2014, 21:47

Quote:

Originally Posted by ghorrocks

There are not many people still around after 10 years but I am still here. A bit older and crustier but still here.

You can define a volumetric heat source as constant or as a function of just about anything. So it can be set per control volume if you want to.

-------------------------------------------------------------------------
Hi Glenn,

Ok, is the source value uniformly distributed to each cell in the control volume?

Thanks,

Allan

ghorrocks · March 11, 2014, 21:53

The whole point of a control volume is that a single value of the variable is representative of the entire control volume. This applies to the source term as well.

But note there is an exception to this - the integration points in CFX means that fluxes are calculated more accurately than if based on simple control volumes with single values. But this is just being pedantic.

March 29, 2004, 05:32	volumetric heat source	#1
ioana Guest Posts: n/a	Hi everbody! I have to model a simple fire, that in other cfd code was set as a volumetric heat source. Does CFX 5.6 have this feature?(i was looking in help and i coudn't find something about this). Thank a lot, ioana

March 29, 2004, 19:40	Re: volumetric heat source	#2
Glenn Horrocks Guest Posts: n/a	Hi ioana, Yes, CFX5 has volumetric heat sources. Glenn

March 11, 2014, 14:13	Volumetric Heat Soruce	#3
azhao New Member Michigan Join Date: Mar 2014 Posts: 2 Rep Power: 0	Is this volumetric heat source linearly distributed in the fluid domain? Or this heat source term is each cell based, the value depending on the cell velocity or flow rate? Thanks!

March 11, 2014, 18:06		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	There are not many people still around after 10 years but I am still here. A bit older and crustier but still here. You can define a volumetric heat source as constant or as a function of just about anything. So it can be set per control volume if you want to. karachun likes this.

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March 11, 2014, 21:53		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	The whole point of a control volume is that a single value of the variable is representative of the entire control volume. This applies to the source term as well. But note there is an exception to this - the integration points in CFX means that fluxes are calculated more accurately than if based on simple control volumes with single values. But this is just being pedantic.