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open boundaries in natural convection

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Old   April 26, 2011, 07:30
Default open boundaries in natural convection
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for natural convection problems with open boundaries when the operating temperature is less than 300 K, i am getting a convergence of 10^-6. But when the operating temperature rises above 300 K i am not getting a convergence. can any one suggest me a reason ?
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Old   June 3, 2011, 18:41
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Can you provide more details? I wonder if your surface temperature is less than your ambient temperature in the second case.
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