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 courtjester140 March 17, 2010 18:51

Negative Pressure?

I have a post open in the meshing/geometry section of the boards. I've finished everything, ran a steady state simulation at 60 mph, k-e turbulence, etc. When I looked at the pressure contour on the surface of the model, at first I thought everything was fine, until I noticed that the legend showed some parts with a negative pressure.

Is this an error that I can fix without too much of a headache? I realized that I need to add inflation layers to my mesh, but without those would a negative pressure occur?

-Michael Petrarca

http://i12.photobucket.com/albums/a2...ureContour.jpg

 ghorrocks March 18, 2010 07:55

The pressure is relative to your reference pressure. Assuming your reference pressure is 1 bar then you have pressure ranging from approx 99500Pa to 100500Pa absolute.

 courtjester140 March 18, 2010 15:49

Quote:
 Originally Posted by ghorrocks (Post 250592) The pressure is relative to your reference pressure. Assuming your reference pressure is 1 bar then you have pressure ranging from approx 99500Pa to 100500Pa absolute.

Thank you for your reply. I thought that this was a representation of absolute pressure. Lesson learned :).

 ghorrocks March 18, 2010 17:47

The absolute pressure is also available as a different variable.

 taojunhust August 11, 2011 23:28

the absolute static pressure of your results will be positive.

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