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October 29, 2017, 01:52
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#21 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,936
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Vorticity is a vector field in a 3D simulation. It does not have a single scalar value to plot on a plane as you appear to have done. You might have plotted the magnitude of the vorticity - that will not have negative values by definition and you will not see the odd symmetry which is what I think you are referring to.
Try plotting the correct vorticity component. It should show the odd symmetry. |
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October 29, 2017, 02:43
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#22 |
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New Member
Hamed
Join Date: Mar 2017
Location: Iran
Posts: 29
Rep Power: 10 |
Dear ghorrocks
Many thanks for your replying and explanation but the problem is that how I should to show the odd symmetry in CFX? I mean is it in volume rendering or any option else in CFD post? Regards Hamed |
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October 29, 2017, 04:54
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#23 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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You have to show a vorticity component (X, Y or Z) on your plane.
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October 29, 2017, 05:42
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#24 |
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New Member
Hamed
Join Date: Mar 2017
Location: Iran
Posts: 29
Rep Power: 10 |
Dear Ghorrocks
I have done what you advised and plotted the vorticity by component so the results are attached but I do not know whether are they really correct or not? would I please to take a look at them and guide me. Best Regards |
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October 29, 2017, 06:02
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#25 |
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New Member
Hamed
Join Date: Mar 2017
Location: Iran
Posts: 29
Rep Power: 10 |
One thing else is these are results for logarithmic color scale and for linear color scale the results became like the attached
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October 29, 2017, 06:14
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#26 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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Doesn't the X and Z components show what you are looking for?
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October 29, 2017, 07:24
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#27 |
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New Member
Hamed
Join Date: Mar 2017
Location: Iran
Posts: 29
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These are the latest results that i have achieved but I want to know are they correct?
Regards, |
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October 29, 2017, 17:35
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#28 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
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Good question. See FAQ: https://www.cfd-online.com/Wiki/Ansy...publishable.3F and https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F
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October 29, 2017, 18:02
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#29 |
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New Member
Hamed
Join Date: Mar 2017
Location: Iran
Posts: 29
Rep Power: 10 |
many thanks, The results seems correct but lastly I wish to have a render for total vorticity like the attached photo I saw in another paper I have seen and I do not know how. So I appreciate if you can guide me.
regards, |
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