|August 12, 2012, 06:35||
Calculating average pressure
I am trying to validate openFoam simulation against experimental results for the Turbine 99 case (see https://dl.dropbox.com/u/40499338/tu...9-geometry.jpg for picture of the geometry, see http://pure.ltu.se/portal/en/publica...a68e967b).html for copy of the documentation describing the case).
One of the parameters that is to be extracted is the averaged pressure along the wall at the inlet (see the white circle on https://dl.dropbox.com/u/40499338/tu...99-pinwall.jpg) - pressure recovery factor described in page 16 of the proceeding (link above). I have done the following:
1) Load the openFoam case with showing only the walls;
2) Create a slice of the wall (which creates the white circle);
3) Apply the "Integrate Variables" filter on the slice;
My assumption is that the average pressure could be obtained by selecting "Cell Data" under the Attribute drop down menu and dividing the pressure by the length. Is this approach correct?
Based on the above approach, the mean pressure is approx -5 (~-12/2.5), which is too low and seems not consistent with the color plots that seems to indicate that the pressure is between -7 and -10.
Thanks a lot if you can help me in either finding another method or clarifying where I am going wrong.
Julien de Charentenay
Last edited by julien.decharentenay; August 12, 2012 at 06:37. Reason: Added reference to Turbine-99 III proceeding
|August 19, 2013, 07:50||
Join Date: Aug 2013
Posts: 50Rep Power: 5
i think what you got from the integrate variable for p is not the average pressure visualized in paraview, but it is the integration of pressure over surface which is also the force acting on the surface.
since the definition of p=F/A
|Thread||Thread Starter||Forum||Replies||Last Post|
|Pressure Outlet Guage pressure||Mohsin||FLUENT||36||April 29, 2016 17:16|
|Error in calculating non dimensional pressure gradient||MANISHBHATIA||FLUENT||0||March 23, 2011 03:50|
|UDF to define or adjust pressure???||engahmed||FLUENT||0||July 6, 2010 17:19|
|calculation average pressure in a plane with UDF||Vitalij||FLUENT||1||April 10, 2007 03:39|
|Gas pressure question||Dan Moskal||Main CFD Forum||0||October 24, 2002 22:02|