interFoam in 1.6.x, solver's slightly changed from 1.5; is p = pd?

kjetil · December 15, 2009, 05:14

Dear foamers,

I have been using 1.6.x and the interFoam/compressibleInterFoam for a pipe flow, and the results look satisifying. However, the pressure values seem to be way too low. Comparing to previous OF releases, the pressure field is now used as 'p', not as 'pd'. Does this mean that solver has changed, or is the 1.6 'p' equal to the 1.5 'pd'? Can I still use the 1.5-dev interFoamPressure-utility, or won't this be necessary?

Thanks.

Ohbuchi · December 15, 2009, 18:41

Hi, Kjetil.

Please refer to the release note for version1.6;

http://www.opencfd.co.uk/openfoam/do...Notes-1.6.html

5.1 Solver restructuring

pd replaced by static pressure p. All solvers in which buoyancy affects might be strong have been converted from using pd to p with improved numerics to give equally good accuracy and stability. This change is prompted by the need to remove the confusion surrounding the meaning and purpose of pd.

December 15, 2009, 05:14	interFoam in 1.6.x, solver's slightly changed from 1.5; is p = pd?	#1
kjetil Senior Member Join Date: Mar 2009 Location: Norway Posts: 137 Rep Power: 17	Dear foamers, I have been using 1.6.x and the interFoam/compressibleInterFoam for a pipe flow, and the results look satisifying. However, the pressure values seem to be way too low. Comparing to previous OF releases, the pressure field is now used as 'p', not as 'pd'. Does this mean that solver has changed, or is the 1.6 'p' equal to the 1.5 'pd'? Can I still use the 1.5-dev interFoamPressure-utility, or won't this be necessary? Thanks.

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December 15, 2009, 18:41		#2
Ohbuchi Member Masashi Ohbuchi Join Date: Oct 2009 Posts: 74 Rep Power: 16	Hi, Kjetil. Please refer to the release note for version1.6; http://www.opencfd.co.uk/openfoam/do...Notes-1.6.html 5.1 Solver restructuring pd replaced by static pressure p. All solvers in which buoyancy affects might be strong have been converted from using pd to p with improved numerics to give equally good accuracy and stability. This change is prompted by the need to remove the confusion surrounding the meaning and purpose of pd.