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-   -   p or p_rgh in "forces" function in controlDict (http://www.cfd-online.com/Forums/openfoam-post-processing/120651-p-p_rgh-forces-function-controldict.html)

mcathela July 11, 2013 11:08

p or p_rgh in "forces" function in controlDict
 
Hi Foamers,

I have a question about the pressure used in the "forces" function in the controlDict file.

My case is a cylinder floating in a tank of water. The free surface is still, there is no incident wave. At t=0, I raise the cylinder of x centimeters (vertically) and then I let it go. I look at the free decay oscillations of the body and I would like to monitor the heave radiation forces.

- if I put "p" for pName, does this mean that I will have the force from the total pressure?
- if I put "p_rgh", does this mean that I will have the hydrodynamic force (from the dynamic pressure)?
- and if I put "p_rgh", does this lead to the correct viscous force?

I hope that someone can bring an answer!

Marie

laurent98 January 10, 2014 02:13

hi,
nobody???
i'am interesting by the answer too...


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