Add total mass using sources to multi component fluids

mullenc525 · February 4, 2011, 19:03

I am trying to add water vapor to a air-water vapor mixture as it travels along a channel. I have the water vapor component using the transport equations and the air component using the constraint equation.

When I add a source term for water vapor to a wall, I notice the CFX help files note that "Sources for a particular component in a multicomponent fluid do not introduce any additional mass and so the sum of all component sources (including the constraint) must be zero."

I do not want this to be the case; I want the air massflow to be constant and the total massflow to increase.

Is there a way to do this?

ghorrocks · February 5, 2011, 05:56

Can you do a mass source as well to keep the air mass conservation?

February 4, 2011, 19:03	Add total mass using sources to multi component fluids	#1
mullenc525 New Member Join Date: Dec 2010 Posts: 26 Rep Power: 15	I am trying to add water vapor to a air-water vapor mixture as it travels along a channel. I have the water vapor component using the transport equations and the air component using the constraint equation. When I add a source term for water vapor to a wall, I notice the CFX help files note that "Sources for a particular component in a multicomponent fluid do not introduce any additional mass and so the sum of all component sources (including the constraint) must be zero." I do not want this to be the case; I want the air massflow to be constant and the total massflow to increase. Is there a way to do this?

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February 5, 2011, 05:56		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Can you do a mass source as well to keep the air mass conservation?