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Old   September 8, 2004, 12:04
Default Reacting flows
  #1
Karthick
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Hai all

Can anybody tell me which discretisation scheme should be selected for modeling reacting flows? My solution is not converging after number of iterations.

Regards Karthick
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Old   September 10, 2004, 07:17
Default Re: Reacting flows
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George
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Hi,

unfortunately switching discretisation scheme most probably won't give you convergence when you don't get converged solution now. Generally the difference between discretisation schemes is in accuracy of the solutions and speed of convergence, but not in attanning convergence. Furthermore, it is often hard or impossible to get fully converged solution in combustion applications - especially if you go straight along the book, i.e. you require the residuals to drop the prescribed number of orders. You should check other convergence criteria first and analyse what is happening during the solution - primarily whether the flow oscillates or not. Your solution can be converged even with slightly higher residuals but it can be unstable and not converged as well.

Hope this helps,

George
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Old   September 10, 2004, 10:44
Default Re: Reacting flows
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Karthick
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Dear George

Thanks for your reply. It is very much convincing for me as I am worried more about convergence of my problem.

Regards Karthick
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