p or p_rgh in "forces" function in controlDict

mcathela · July 11, 2013, 11:08

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, 01:13

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

July 11, 2013, 11:08	p or p_rgh in "forces" function in controlDict	#1
mcathela New Member Cathelain Join Date: Apr 2013 Posts: 11 Rep Power: 13	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 mbots likes this.

January 10, 2014, 01:13		#2
laurent98 Member laurentL Join Date: Oct 2011 Location: new caledonia Posts: 73 Rep Power: 14	hi, nobody??? i'am interesting by the answer too... mbots likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Other] mesh airfoil NACA0012	anand_30	OpenFOAM Meshing & Mesh Conversion	13	March 7, 2022 17:22
controlDict 'forces' function: multiple output files?	lordvon	OpenFOAM	0	January 10, 2011 16:22
Compilation errors in ThirdPartymallochoard	feng_w	OpenFOAM Installation	1	January 25, 2009 06:59
Problem with compile the setParabolicInlet	ivanyao	OpenFOAM Running, Solving & CFD	6	September 5, 2008 20:50
Please help about the VTKFoam	liugx212	OpenFOAM Running, Solving & CFD	0	November 18, 2005 18:27