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November 6, 2016, 06:38 |
simpleFoam - setting the pref value
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#1 |
Member
Giles Richardson
Join Date: Jun 2012
Location: Cambs UK
Posts: 98
Rep Power: 13 |
I have been running simpleFoam for flow analysis over a car and initially set pref = 101325 (in the fvSolution file) which was giving quite large forces when integrating the surface pressure over a car body.
I then changed pref=0 and re-ran the same case, giving significantly lower force values (and more realistic CL & CD), when integrating the surface pressure on vehicle. Think it maybe be related to the surface pressure integration method in Paraview. Last edited by ufocfd; November 6, 2016 at 14:55. |
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November 9, 2016, 13:34 |
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#2 |
Senior Member
Mahdi Hosseinali
Join Date: Apr 2009
Location: NB, Canada
Posts: 273
Rep Power: 18 |
When you're solving incompressible flow the absolute pressure is not important, it's just the gradient (even when integrating an immersed surface such as a car body). If your solutions are correct velocity profiles should be reasonable.
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Tags |
prefcell/prefvalue, simplefoam |
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