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Old   August 23, 2009, 22:15
Default Fire Simulation Problems
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Hi. I was wondering if someone could help me with the problems I've been having modeling an open air flame (pool fire).

I've been using the k-e model with eddy dissipation for the model. I modelled everything in steady state with gravity off and switched to a transient solution with gravity and radiation turned on. The solution, however, does not change from the steady state if I put a time scale of .001 seconds. If I put a larger time scale, the solution will change, but will not converge in each time step.

Also, what's the best approach to model the flame. A cold flow first? I've taken this approach but havn't gotten good results.
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Old   August 25, 2009, 19:26
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Quote:
Originally Posted by alkidos View Post
The solution, however, does not change from the steady state if I put a time scale of .001 seconds. If I put a larger time scale, the solution will change, but will not converge in each time step.
If you find the longer time scale, when the solution still converge, you shouldn't increase it anymore.
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