- **OpenFOAM Running, Solving & CFD**
(*http://www.cfd-online.com/Forums/openfoam-solving/*)

- - **Hydrostatic head**
(*http://www.cfd-online.com/Forums/openfoam-solving/59799-hydrostatic-head.html*)

I am about to simulate the "hiI am about to simulate the "hidrostatic head" of a simple column (cylinder full of water).
the remaining equation to solve is actually dp/dz=rho*g (1) So, I added the gravity to the momentum equation and set u-vectors equal to zero. No inlet to the cylinder and no outlet. Just water. And I want to calculate the pressure difference between the top and the bottom of the cylinder. however the result is not matching the equation p(top)-p(bottom)=rho*g*h (2) and I dont have an explanation for that. Henry netioned in the board that the pressure p in simpleFoam is rho/p. If I take the equation into account, the calculated result is not matching eq.(2) anyway. Unfortunately, I dont know how to handle that situation in OpenFoam. What BC do I need for this job? Any help you can give would be very much appreciated. Regards, Holger |

Hello Holger,
I am also havHello Holger,
I am also having problems with hydrostatic equilibrium. I would also like to know if someone has a solution for this problem. Shaun |

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