Tutorial, Pressure initial conditions
Dear Forum,
I've been going over the 2.1 icoFoam tutorial. It is stated there that for an incompressible flow, we identify pressure as kinematic pressure. Hence, in the pressure initial conditions file, we specify it as m^2/s^2. I've been going over my old incompressible aerodynamics noteboot and can't seem to find out the reason why. Am I to worry or simply accept that the program accepts: - kinematic pressure for incompressible cases - regular pressure for compressible Thanks in advance, Wormer |
Thanks Bruno :),
So in general, when working with OpenFoam I should formulate the problem at hand, then choose a solver and then get to know it (by that realizing all the simplifications possibly made in it)? Thanks again :). |
Hi Alexey,
You're welcome. And yes, the idea is to formulate and understand the problem you're trying to solve. This is also the idea that is given right on the first tutorial: http://www.openfoam.org/docs/user/cavity.php - the first time I was reading the tutorial, I thought to myself (didn't have any CFD experience at the time): "Why on Earth do I need to know the Courant Number and what it means?" Sometimes, you might also end up having to create (copy-paste-change) a solver yourself, either due to those simplifications, or simply because - as a wild example - you might need multiphase flows with radiation and electromagnetic fields! Although sometimes someone has already made such a solver and has either made a paper about it and/or posted the code somewhere :) Best regards, Bruno |
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