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-   -   Residual Curve (http://www.cfd-online.com/Forums/openfoam-solving/94836-residual-curve.html)

Nilesh_87 November 28, 2011 03:45

Residual Curve
 
Hello Everyone,
Can anybody suggest me how to plot residual curve in para-view? and how to get co-efficient of pressure plot. Cause only pressure plot is coming.

romant November 28, 2011 03:56

paraview won't plot your residual plot, since the data is not stored in any of the fields. if you want a residual plot you should take a look at this thread http://www.cfd-online.com/Forums/ope...residuals.html

what kind of coefficients do you mean?

Nilesh_87 November 28, 2011 04:02

Residual curve:-
 
Hello Roman,
I am asking about co-efficient of pressure for external aerodynamic problem.

romant November 28, 2011 04:04

you have to calculate those from the force balances

you probably want to have have the lift and drag coefficient. have a look at the function object and how to calculate the force coefficients. i think i have seen similar threads in the forum.

MadsR January 23, 2012 05:43

Hey,

I guess you now know how to get the residuals, right?

For the pressure coefficient, you could use ParaView (you need a reasonably new version). Read your geometry into ParaView and do a PlotOnIntersectionCurves - then you can get the surface pressure out and eventually compute your pressure coefficient either inside ParaView or outside it (which is what I do).

Mads

Nilesh_87 January 23, 2012 12:59

Thanks
 
Hello Madsr,
yes i can plot residuals now, i will try as per your suggestion.

Thanks and regards,
Nilesh

hewei April 2, 2012 10:14

Quote:

Originally Posted by Nilesh_87 (Post 340664)
Hello Madsr,
yes i can plot residuals now, i will try as per your suggestion.

Thanks and regards,
Nilesh

Hi Nilesh, how did you plot residuals in ParaView? would you like to tell me?
Thank you!
Wei.

s.m April 28, 2013 03:43

4 Attachment(s)
Quote:

Originally Posted by MadsR (Post 340589)
Hey,

I guess you now know how to get the residuals, right?

For the pressure coefficient, you could use ParaView (you need a reasonably new version). Read your geometry into ParaView and do a PlotOnIntersectionCurves - then you can get the surface pressure out and eventually compute your pressure coefficient either inside ParaView or outside it (which is what I do).

Mads


hi Mads
how can i use PlotOnIntersectionCurves
in paraview? i don't know what normal i should use, x y or z ?
i put my VTK file of the airfoil and the forceCoeffs on it in the following, would you please please give me some advice to use PlotOnIntersectionCurves?
thank you very very much:)

wyldckat April 28, 2013 12:30

FYI: I've answered to Saeideh Mohamadi on the following thread: http://www.cfd-online.com/Forums/ope...-airfoils.html


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