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-   -   vorticity resolution in paraFoam (http://www.cfd-online.com/Forums/openfoam-paraview/106657-vorticity-resolution-parafoam.html)

ebah6 September 4, 2012 18:35

vorticity resolution in paraFoam
 
2 Attachment(s)
Dear all,

I am using the "Filters/calcualteDerivatives" option to visualise the vorticity magnitude. But the resolution is quite not good.
Attached are two snapshots of the velocity magnitude and the vorticity magnitude.
Can someone direct me on how to get a resolution of the vorticity similar to that of the velocity?

Please, note that in the down-scroll bar, the velocity can be show with a bad resolution as well. But the vorticity has the bad one only.

best regards.

Tobi September 6, 2012 10:05

2 Attachment(s)
Quote:

Originally Posted by ebah6 (Post 380231)
Dear all,

I am using the "Filters/calcualteDerivatives" option to visualise the vorticity magnitude. But the resolution is quite not good.
Attached are two snapshots of the velocity magnitude and the vorticity magnitude.
Can someone direct me on how to get a resolution of the vorticity similar to that of the velocity?

Please, note that in the down-scroll bar, the velocity can be show with a bad resolution as well. But the vorticity has the bad one only.

best regards.

Hi ebah,

do you mean sth like that (attachment)?
I used icoFoam and the post-utility "vorticity"; there you get the interpolation solution.

Hope it helps you.

Tobi

ebah6 September 6, 2012 13:32

Thank you Tobias,

This is what I need.
Can tell how you obtain it.
Say I have run my case and have the velocity field; how can continue from there?
Or should I re-start the run and compute the vorticity in the same manner as the pressure and velocity fields?

Thank you for time.

Tobi September 6, 2012 16:31

Quote:

Originally Posted by ebah6 (Post 380602)
Thank you Tobias,

This is what I need.
Can tell how you obtain it.
Say I have run my case and have the velocity field; how can continue from there?
Or should I re-start the run and compute the vorticity in the same manner as the pressure and velocity fields?

Thank you for time.

Hi,

you just have to type

Code:

vorticity
after your simulation in your case directory.
After that the utility calculates the vorticity from the velocity field.

Tobi

ebah6 September 6, 2012 17:05

Thank you very much.
This works perfect.

my best regards.

odellar February 26, 2014 11:01

Doesn't show vorticty?
 
Hi,

I've used the vorticity, and ptot utilities after solving for my case, and it computes the vorticity and ptot fields (I can tell it's worked because the data is there in the folders 0, 0.1, etc) but when I open the case in ParaFoam it still only gives me options to display U, Umag, and p, not vorticity or ptot -- how do I get this?

Thanks
Olie

odellar February 26, 2014 11:04

Fixed!
 
Quote:

Originally Posted by odellar (Post 476927)
Hi,

I've used the vorticity, and ptot utilities after solving for my case, and it computes the vorticity and ptot fields (I can tell it's worked because the data is there in the folders 0, 0.1, etc) but when I open the case in ParaFoam it still only gives me options to display U, Umag, and p, not vorticity or ptot -- how do I get this?

Thanks
Olie


Sorry forget this - just found it!

Soham Harshe November 19, 2014 10:27

Quote:

Originally Posted by odellar (Post 476928)
Sorry forget this - just found it!

I am having the same problem. Can you please tell how to fix this ?

wanrui June 15, 2015 12:30

Quote:

Originally Posted by odellar (Post 476928)
Sorry forget this - just found it!

Sorry, how did you find the ptot data? I have the same problem in finding it in the paraFoam


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