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-   -   Dimension in the p-file (https://www.cfd-online.com/Forums/openfoam-solving/224057-dimension-p-file.html)

rayleigh-taylor February 5, 2020 20:37

Dimension in the p-file
 
Can anyone tell me why in the p(ressure)-files which can be found in the tutorial folders "0", the dimension has the form
[0 2 -2 0 0 0 0] (=m^2/s^2) ? Actually i suggested the form
[1 -1 -2 0 0 0 0] (=(kg/(m*s^2)) for Pa...

clapointe February 5, 2020 21:17

Pressure units depend on whether the solver is compressible (and the units are "real" pressure units) or incompressible (and the units are for "kinematic pressure, i.e. pressure/density). There are many threads on this topic -- see e.g. https://www.cfd-online.com/Forums/op...e-solvers.html or https://www.openfoam.com/documentati...-pressure.html.

Caelan

rayleigh-taylor February 6, 2020 10:48

Thanks a lot for the hint, Caelan!
Now I see the point.



Hiker


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