Question about CFX-Pre Variables

seaharrier · July 28, 2009, 09:04

Hi,EVERYONE,

I am simulating Droplet-Gas two-phase flow, and I want to use the impact angle of droplets on the wall to compute other variable,
But I can not find this variable in CFX-Pre ,

COULD someone give me a help?

Thanks!

stumpy · July 29, 2009, 08:13

I assume this is Eulerian 2 phase flow. Perhaps you could create a boundary-only Additional Variable, setting it to a function of the phase Velocity vector and the surface normal vector ( i think that variable is called "Normal Direction X | Y | Z"). I think boundary-only AV's are a CCL-only feature (I could be wrong here) - if so, just create a normal algebraic AV, then add the Boundary Only parameter to the CCL. You'll need to check the RULES files in the <install root>/<version>/CFX/etc directory to see exactly the correct syntax.

July 28, 2009, 09:04	Question about CFX-Pre Variables	#1
seaharrier New Member Join Date: Jun 2009 Posts: 11 Rep Power: 17	Hi,EVERYONE, I am simulating Droplet-Gas two-phase flow, and I want to use the impact angle of droplets on the wall to compute other variable, But I can not find this variable in CFX-Pre , COULD someone give me a help? Thanks!

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July 29, 2009, 08:13		#2
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	I assume this is Eulerian 2 phase flow. Perhaps you could create a boundary-only Additional Variable, setting it to a function of the phase Velocity vector and the surface normal vector ( i think that variable is called "Normal Direction X \| Y \| Z"). I think boundary-only AV's are a CCL-only feature (I could be wrong here) - if so, just create a normal algebraic AV, then add the Boundary Only parameter to the CCL. You'll need to check the RULES files in the <install root>/<version>/CFX/etc directory to see exactly the correct syntax.