Iso-surface plot

lehoanganh07 · December 25, 2013, 07:43

Dear Fluent User,

I am modeling cavitation in 3-D Nozzle. I try to plot cavity as in the picture below ( the cavity appare in the Nozzle hole). I tried to use Iso-surface but it not work as I expect.
Could some one help me how to do that?
Thank you very much!

(Sorry I dont know hoe to add image in the forum)

This is the image of my model
http://img577.imageshack.us/img577/2517/3p2f.jpg
And this is the example cavity plot which I want to do
http://img29.imageshack.us/img29/1276/xmi6.jpg

Zaktatir · December 25, 2013, 11:33

I don't understand: are you asking by which variable you want to the create the iso-plot?

You may create the isoplot by means of the void fraction and then using another variable for post-processing on the created surface

lehoanganh07 · December 25, 2013, 20:16

Quote:

Originally Posted by Zaktatir

I don't understand: are you asking by which variable you want to the create the iso-plot?

You may create the isoplot by means of the void fraction and then using another variable for post-processing on the created surface

Thank you,
I mean do you know how to use Iso-surface or onothe option in Fluent to plot the cavity structure as in picture I posted above?
I used contour plot but it just show the position of cavity and we could not see the cavity struture(3D), also I tried to use Iso-surface as advice from anothe topic in Forum or in Fluent guid, but it still not work

Zaktatir · December 26, 2013, 05:15

by which variable is the cavity specified? VOF or anything else?

lehoanganh07 · December 26, 2013, 09:12

Quote:

Originally Posted by Zaktatir

by which variable is the cavity specified? VOF or anything else?

Yes, the VOF

Zaktatir · December 27, 2013, 07:58

then follow my first reply and then we will see

lehoanganh07 · December 27, 2013, 08:20

Thank Zaktatir,
But could you tell me detail how to do that? I dont clearly understand you reply

Zaktatir · December 27, 2013, 10:34

-1/Create a Surface by Iso-Value (Iso-Surface)
2/ Choose VOF as the variable of interest and give a reference Value
3/Then you have now a new surface which may be used for further post-processing

By the why how high is the void fraction for your cavity (0,5?)?

lehoanganh07 · December 27, 2013, 22:12

I dont kown what value should use, because the VOF value from 0.1 to 0.9

December 25, 2013, 07:43	Iso-surface plot	#1
lehoanganh07 Member le hoang anh Join Date: Oct 2012 Posts: 96 Rep Power: 13	Dear Fluent User, I am modeling cavitation in 3-D Nozzle. I try to plot cavity as in the picture below ( the cavity appare in the Nozzle hole). I tried to use Iso-surface but it not work as I expect. Could some one help me how to do that? Thank you very much! (Sorry I dont know hoe to add image in the forum) This is the image of my model http://img577.imageshack.us/img577/2517/3p2f.jpg And this is the example cavity plot which I want to do http://img29.imageshack.us/img29/1276/xmi6.jpg

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December 25, 2013, 11:33		#2
Zaktatir Senior Member Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 17	I don't understand: are you asking by which variable you want to the create the iso-plot? You may create the isoplot by means of the void fraction and then using another variable for post-processing on the created surface

December 26, 2013, 05:15		#4
Zaktatir Senior Member Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 17	by which variable is the cavity specified? VOF or anything else?

December 27, 2013, 07:58		#6
Zaktatir Senior Member Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 17	then follow my first reply and then we will see

December 27, 2013, 08:20		#7
lehoanganh07 Member le hoang anh Join Date: Oct 2012 Posts: 96 Rep Power: 13	Thank Zaktatir, But could you tell me detail how to do that? I dont clearly understand you reply

December 27, 2013, 10:34		#8
Zaktatir Senior Member Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 17	-1/Create a Surface by Iso-Value (Iso-Surface) 2/ Choose VOF as the variable of interest and give a reference Value 3/Then you have now a new surface which may be used for further post-processing By the why how high is the void fraction for your cavity (0,5?)?

December 27, 2013, 22:12		#9
lehoanganh07 Member le hoang anh Join Date: Oct 2012 Posts: 96 Rep Power: 13	I dont kown what value should use, because the VOF value from 0.1 to 0.9