Unit of the Pressure

Dear all

it took me a long time to find the error cause of the unit of the pressure. I thought p has the unit of kg/m/s^2, so i gave the dimension of the p in CFD [1 -1 -2 0 0 0 0]. But the unit of p in CFDEM from the tutorials is [0 2 -2 0 0 0 0], m^2/s^2, it means u^2. Am i right?
Could some one tell me why it is so? so in this case, the p in the CFD is not actually the pressure, but p/rho? or?

Thanks a lot!

best regards

Zhen

Forums:

CFDEM®coupling - User Forum

alice | Tue, 08/14/2012 - 18:25

Hello Zhen, you are right,

Hello Zhen,
you are right, the pressure is divided by rho. This convention holds for all incompressible solvers in OpenFOAM and thus also for the solvers that come with CFDEM coupling.
Cheers,
Alice

Zhenli | Wed, 08/15/2012 - 09:54

Thanks

Thanks, Alice.

I didnt realize that it was a incompressible solver before.
I just thought, it was similar as the twoPhaseEulerFoam.

Thanks again!