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-   -   Vorticity Contour (http://www.cfd-online.com/Forums/openfoam-post-processing/114500-vorticity-contour.html)

 VSass March 12, 2013 06:57

Vorticity Contour

Hey Foamers,

i've used the vorticity utility to calculate the vorticuty of my flow but i don't know how to plot it in Paraview. Is there any way except the stream tracer->coloured by : vorticity?

Thanks

 just4pipi May 29, 2013 11:07

hello

you can directly choose the viarible Vorticity in the board in Paraview.It's besides the P.U.
pipi

 VSass May 29, 2013 14:56

Thanks! After weeks i found out that you must first select it from the fields menu below "mesh parts".

thanks anyway!

 just4pipi May 30, 2013 03:24

vSass:
Do you know how to extract or compute the displacement of a plate moving in a flow field? I am trying a FSI problem,but I can't get it.
p1p1

 VSass May 30, 2013 03:47

I have a little experience with FSI problems using OpenFoam.

Which solver are you using?

 immortality June 2, 2013 02:10

hi
whats a FSI problem?what does it stands for?

 VSass June 2, 2013 07:16

It stands for flow-structure-interaction, and it's about calculating stresses and displacements of the structure due to the presence of the flow.

 immortality July 1, 2013 12:41

Hi Vasileios
how do you define vorticity in 0 folder?
my case gives an error on it.
Code:

```Time = 0.00027     Reading U     Calculating vorticity vorticity max/min : 6832530.652 0.1754425241 End Time = 0.000271     Reading U     Calculating vorticity vorticity max/min : 6886705.616 0.1203675751 End Time = 0.000272     Reading U     Calculating vorticity vorticity max/min : 6860999.599 0.1231681867 End Time = 0.000273     Reading U     Calculating vorticity vorticity max/min : 6779457.723 0.1109132494 End Time = 0.000274     Reading U     Calculating vorticity vorticity max/min : 6905465.041 0.03421409343 End Time = 0.000275     Reading U     Calculating vorticity vorticity max/min : 7015169.336 0.2944563456 End Time = 0.000276     Reading U     Calculating vorticity vorticity max/min : 7120398.407 0.1211598064 End ehsan@Ehsan-com:~/Desktop/WR\$ paraFoam created temporary 'WR.OpenFOAM' --> FOAM FATAL IO ERROR: "ill defined primitiveEntry starting at keyword 'T0_4=973;' on line 16 and ending at line 65" file: /home/ehsan/Desktop/WR/0/include/variables_R at line 65.     From function primitiveEntry::readEntry(const dictionary&, Istream&)     in file lnInclude/IOerror.C at line 132. FOAM exiting```

 VSass July 2, 2013 08:07

Well, you don't need to define it yourself. What is your doubt about?

 immortality July 2, 2013 09:42

that's OK now.how can improve the quality of contoour shapes?they have too contrast from blue to red.do you change the range in paraview?till what value?

 VSass July 2, 2013 10:10

Maybe the number of colours that you choose for your presentation can fix the problem. I use 17 colours. You can adjust them by clicking on the "Edit Colour Map" button.

 immortality July 2, 2013 11:02

that's very better now.I confined its range scal to [-20000,200000] and 17 colors as you said.

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