Residual Curve

Nilesh_87 · November 28, 2011, 02:45

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, 02:56

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, 03:02

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

romant · November 28, 2011, 03:04

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, 04:43

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, 11:59

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

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

Quote:

Originally Posted by MadsR

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

November 28, 2011, 02:45	Residual Curve	#1
Nilesh_87 New Member Nilesh Tank Join Date: Oct 2011 Location: India Posts: 5 Rep Power: 14	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.

November 28, 2011, 02:56		#2
romant Senior Member Roman Thiele Join Date: Aug 2009 Location: Eindhoven, NL Posts: 374 Rep Power: 20	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? __________________ ~roman

November 28, 2011, 03:02	Residual curve:-	#3
Nilesh_87 New Member Nilesh Tank Join Date: Oct 2011 Location: India Posts: 5 Rep Power: 14	Hello Roman, I am asking about co-efficient of pressure for external aerodynamic problem.

November 28, 2011, 03:04		#4
romant Senior Member Roman Thiele Join Date: Aug 2009 Location: Eindhoven, NL Posts: 374 Rep Power: 20	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. __________________ ~roman

January 23, 2012, 04:43		#5
MadsR Senior Member Mads Reck Join Date: Aug 2009 Location: Copenhagen, Denmark Posts: 177 Rep Power: 17	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 Tobias Adam likes this. __________________ Online free airfoil-mesher for OpenFOAM here

January 23, 2012, 11:59	Thanks	#6
Nilesh_87 New Member Nilesh Tank Join Date: Oct 2011 Location: India Posts: 5 Rep Power: 14	Hello Madsr, yes i can plot residuals now, i will try as per your suggestion. Thanks and regards, Nilesh

April 28, 2013, 12:30		#9
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	FYI: I've answered to Saeideh Mohamadi on the following thread: http://www.cfd-online.com/Forums/ope...-airfoils.html MadsR likes this. __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

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