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Need help to show volume fraction in Fluent

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Old   October 19, 2012, 08:39
Default Need help to show volume fraction in Fluent
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le hoang anh
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Hi everybody!
I am modeling cavitation in pump, but when display the Contours/phase/ Volume fraction for vapor, i have picture like this( TK-xamthuc-thaydoiap-0.3-phahoi21.jpg).
But i saw some one who can show Vapor volume fraction as the picure image008.gif and image016.jpg.
So please help me how to do like that. Thank you very much
Attached Images
File Type: jpg TK-xamthuc-thaydoiap-0.3-phahoi21.jpg (41.1 KB, 98 views)
File Type: gif image008.gif (21.5 KB, 84 views)
File Type: jpg image016.jpg (8.4 KB, 84 views)
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Old   October 19, 2012, 09:24
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Hi,
You have plotted contours of volume fraction, whereas the pictures you want to produce are iso surfaces of volume fraction. to do that, you go to surface/iso-surfaces.
I hope this helps,
Marion.
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Old   October 19, 2012, 21:54
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Thank Marion,
I try to do that but it is still not working.
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Old   October 20, 2012, 12:59
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Quote:
Originally Posted by lehoanganh07 View Post
Hi everybody!
I am modeling cavitation in pump, but when display the Contours/phase/ Volume fraction for vapor, i have picture like this( TK-xamthuc-thaydoiap-0.3-phahoi21.jpg).
But i saw some one who can show Vapor volume fraction as the picure image008.gif and image016.jpg.
So please help me how to do like that. Thank you very much
You should use iso-surfaces, The two photos have been taken using iso-surfaces.
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Old   October 20, 2012, 23:10
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Thank for your help! But I can not creat Iso-surface on my model.
Please help me!
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Old   October 22, 2012, 08:23
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Hi,
Why isn't it working?
Looking at your contour plot, I saw that you only have a max of 8.10E-5 for your volume fraction - that is very very small... Are you trying to create iso surfaces below this value?
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Old   October 22, 2012, 09:58
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Quote:
Originally Posted by Marion View Post
Hi,
Why isn't it working?
Looking at your contour plot, I saw that you only have a max of 8.10E-5 for your volume fraction - that is very very small... Are you trying to create iso surfaces below this value?
Marion.
yes, I did it but it is still as this picture, I can not display bubble which is the same 2 picture I posted.
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Old   October 23, 2012, 05:26
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Hi,
When you create the iso-surface, DO NOT select a surface on the right hand side of the panel. That way it will create an iso surface for your domain, not on an existing surface (which I assume is what we see on your last picture)
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Old   August 12, 2014, 03:03
Unhappy volume fraction problems
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I'm a beginner with CFD, Fluent, Multiphase & VOF. So please bear with me if my question is too obvious.
I am modeling a distributor, with 1 inlet & 4 outlets, trying to find the volume fraction of my 2nd phase & have been following the instructions I found here & in the manual. But somehow I ended up with this (attached pic) 2 distributors instead of one!!!!
& the gradient of results is stuck in 3.5e-1 for all colors!!
I don't know what I did wrong
Please help me
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File Type: jpg confusing_volume fraction.jpg (82.0 KB, 16 views)
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