Visibility

njssdfu · November 4, 2011, 07:48

Hello,
I'm trying to do smoke simulation in CFX. I defined smoke with ADDITIONAL VARIABLE.
1. How could I shown in results mass ratio of fresh air and smoke?
2. How could I define new contour. I would like to have contour of visibility. I know the equation but I don't know where to define it.
S=3/(m*7.6)
Where:
S-visibility
m-is defined in additional variable.
Thank you for help. Or please send me page number in user guide because I can't find it.

EDIT: Ok I solved problem with second point. It is showing some strange result but I will corect it. So help me just with the first one. I can't find that type of contour.

ghorrocks · November 6, 2011, 04:52

1) If you equation a certain additional variable quantity to a certain mass fraction then this is straight forward.
2) Define this as a variable in CFD-Post. Then you can plot an isosurface of it.

November 4, 2011, 07:48	Visibility	#1
njssdfu New Member Tom Join Date: Sep 2010 Posts: 4 Rep Power: 15	Hello, I'm trying to do smoke simulation in CFX. I defined smoke with ADDITIONAL VARIABLE. 1. How could I shown in results mass ratio of fresh air and smoke? 2. How could I define new contour. I would like to have contour of visibility. I know the equation but I don't know where to define it. S=3/(m7.6) Where: S-visibility m-is defined in additional variable. Thank you for help. Or please send me page number in user guide because I can't find it. EDIT: Ok I solved problem with second point. It is showing some strange result but I will corect it. So help me just with the first one. I can't find that type of contour. Last edited by njssdfu; November 4, 2011 at 09:12.*

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November 6, 2011, 04:52		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	1) If you equation a certain additional variable quantity to a certain mass fraction then this is straight forward. 2) Define this as a variable in CFD-Post. Then you can plot an isosurface of it.