CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Post-Processing

Pressure distribution around airfoil

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   March 25, 2013, 08:29
Default Pressure distribution around airfoil
  #1
New Member
 
Join Date: Mar 2013
Posts: 3
Rep Power: 4
stater is on a distinguished road
Hi,

It's my first question in this forum and I hope a reply.
I'm trying to plot the pressure distribution around airfoil (just near the wall. Is there anyone who can help me to do that.
I'm using paraview and the results are obtained by OpenFOAM.
Thank your for your help
stater is offline   Reply With Quote

Old   March 25, 2013, 12:06
Default
  #2
Senior Member
 
Håkon Strandenes
Join Date: Dec 2011
Location: Norway
Posts: 111
Rep Power: 10
haakon will become famous soon enough
This was discussed yesterday: SampleDict Pressure Plot across a wing chord I hope that you find your answer there.
haakon is offline   Reply With Quote

Old   March 25, 2013, 12:37
Default
  #3
Member
 
Eric R
Join Date: Jul 2012
Location: Mississippi State University
Posts: 75
Rep Power: 5
msuaeronautics is on a distinguished road
Stater,

An alternative method (compared to what's in that thread) is to just open the airfoil surface VTK file in Paraview and take a chordwise plane slice.

Once you've done this, open up the Spreadsheet View and select that slice in the small drop-down menu. Click File ---> Export Data (or something to that effect). This will export pressure at data points on that plane slice on the surface of the airfoil into a .csv file, which can be further manipulated.

Please let me know if you need any further help.
msuaeronautics is offline   Reply With Quote

Old   March 26, 2013, 13:21
Default
  #4
New Member
 
Join Date: Mar 2013
Posts: 3
Rep Power: 4
stater is on a distinguished road
Hi haakon and msuaeronautics,

thank you for yours helps.
Finally I preferred the Fimiya method's mentioned in Haakon tread, it was easy to doing it. However I have problem with method using sampleDict.
I put sampleDict in system directory and I launched OP, but at the end I don't know where to go to plot the pressure using gnuplot

My sampleDict is as follow

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.0.1 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object sampleDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

setFormat gnuplot;

surfaceFormat raw;

fields
(
p
);

sets
(
TopAirfoil
{
type cloud;
axis x;
points ((0.0473 0.0168 0.000)(0.9452 0.2397 0.000));
}

bottomAirfoil
{
type cloud;
axis x;
points ((0.9452 0.2397 0.000)(0.0493 0.0090 0.000));
}
);

// ************************************************** ********************* //

Thinks again
stater is offline   Reply With Quote

Old   April 26, 2013, 06:56
Default
  #5
s.m
Senior Member
 
saeideh mohamadi
Join Date: Aug 2012
Posts: 229
Rep Power: 6
s.m is on a distinguished road
Quote:
Originally Posted by msuaeronautics View Post
Stater,

An alternative method (compared to what's in that thread) is to just open the airfoil surface VTK file in Paraview and take a chordwise plane slice.

Once you've done this, open up the Spreadsheet View and select that slice in the small drop-down menu. Click File ---> Export Data (or something to that effect). This will export pressure at data points on that plane slice on the surface of the airfoil into a .csv file, which can be further manipulated.

Please let me know if you need any further help.
hi stater, thanks for explaning us, i have a question:
how should we take a chordwise plane slice?
thank you very much
s.m is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
"Pressure Inlet" Boundary Setup Wijaya FLUENT 14 August 26, 2015 06:02
Bad pressure distribution in pump oringo FLUENT 2 March 2, 2013 11:38
Pressure BC for combustion chamber Giuki FLUENT 1 July 19, 2011 11:35
pressure distribution with pyFoam gimli79 OpenFOAM 2 May 4, 2010 05:28
Airfoil pressure distribution kanishkpanchal Main CFD Forum 2 December 7, 2009 14:21


All times are GMT -4. The time now is 12:00.