Ok to increase gravity gradually from 0 to 9.82?
Hello everyone,
I recently started to learn CFD and I am currently working on a problem which can be classified as a bouyancy-driven flow (natural convection) in a closed domain. The domain is heated to ~1500 K in the middle but is cooled to ~350 K at the walls. The pressure in the domain is ~1500 bar. By experimenting and reading the recommendations in the fluent documentation I have come up with a solution technique which seems to give reasonable results:
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I don't see a problem here. Or do you want to make a transient calculation to compare to an experiment or somthing? (want to see .... at 3sec e.g.)
Otherwise this works out. Probaly you can try to increase gravity faster (just to save time), but I think your way is right. |
Thanks for the answer Zigainer!
No I am not interested to look at specific times in the heating process, just the final state. Yes, I can probably increase it a bit faster, but not so much it seems. When I increase the gravity too much, the flow (and final solution) can change quite dramatically from how it looked in the initial steady state solution. I want the flow directions to change as little as possible in each gravity increase and strive to get a final solution which looks close to the initial steady state solution, just higher velocities. Is this way to think right? In one way it feels like I am forcing the solution to look like I want it to. Thanks |
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