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how to define natural convection

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Old   July 24, 2005, 16:28
Default how to define natural convection
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Ejaz Ahmed
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Hello

How should i define the natural convection boundary condition on the outer side of wall. Flow is taking place in the pipe, axis-symmetric case is taken. When I define this boundary condition by selecting the convective boudary condition. Results of fluent say that both on inner and outer side of wall the film coefficient is same(5w/sq-m k).

What i am doing wrong.

thanx in advance.

Ejaz Ahmed
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