Mass Transfer across Wall

Eli · March 9, 2010, 04:04

Hi There
Has anyone an experience on modeling mass transfer from wall?

I'm trying to simulate mass suction on an artery wall, but when I set a source of continuity on wall (just for floating particles in blood domain), the result doesn't really make sense.

I appreciate any hint...

Thanks alot

ghorrocks · March 9, 2010, 04:25

Conceptually it is simple, just a mass source/sink and there you are. So can you explain what is not making sense?

Eli · March 9, 2010, 04:58

Thank you Glenn for your answer

well, This is a Eulerian multiphase problem (Blood+ particles)
I set a negative source on mass flux for particles, So I expect to have almost zero mass flow for Blood! But when I calculate the mass flow on wall, CFX-Post reports significant amount of that for Blood...

Also I think it doesn't understand the suction via negative flux beacuse in report viewer the mass flow on outlet is larger than inlet, that means there is mass flux INTO the domain!!!

thanks again

cosine · November 4, 2010, 05:51

Hi Ellen,

I am working on a similar problem. Did you find out how to work with it?
I am trying to use interface between arterial lumen and wall defining a flux in boundary condition.
However, i am not sure if the particles from the lumen are transferred across the endothelium.
Could you help me?

Thanks

March 9, 2010, 04:04	Mass Transfer across Wall	#1
Eli New Member Join Date: Mar 2009 Posts: 18 Rep Power: 17	Hi There Has anyone an experience on modeling mass transfer from wall? I'm trying to simulate mass suction on an artery wall, but when I set a source of continuity on wall (just for floating particles in blood domain), the result doesn't really make sense. I appreciate any hint... Thanks alot

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March 9, 2010, 04:25		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Conceptually it is simple, just a mass source/sink and there you are. So can you explain what is not making sense?

March 9, 2010, 04:58		#3
Eli New Member Join Date: Mar 2009 Posts: 18 Rep Power: 17	Thank you Glenn for your answer well, This is a Eulerian multiphase problem (Blood+ particles) I set a negative source on mass flux for particles, So I expect to have almost zero mass flow for Blood! But when I calculate the mass flow on wall, CFX-Post reports significant amount of that for Blood... Also I think it doesn't understand the suction via negative flux beacuse in report viewer the mass flow on outlet is larger than inlet, that means there is mass flux INTO the domain!!! thanks again

November 4, 2010, 05:51		#4
cosine Member Join Date: Apr 2009 Posts: 34 Rep Power: 17	Hi Ellen, I am working on a similar problem. Did you find out how to work with it? I am trying to use interface between arterial lumen and wall defining a flux in boundary condition. However, i am not sure if the particles from the lumen are transferred across the endothelium. Could you help me? Thanks