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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

About the displacement
 
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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