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Energy eqn is nt converging.......plz help?

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Old   March 25, 2006, 14:20
Default Energy eqn is nt converging.......plz help?
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preethi
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hi every body

i am simulating 3-D high molten steel flow in rectangular vessal.i am also incorporating buoyancy forces.But energy eqn is not converging can any body tell me what might be the cause? i"ll be very much glad if any bodyhelp me how to solve buoyancy forces ??//

Thx in advanse preethi
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Old   March 27, 2006, 11:32
Default Re: Energy eqn is nt converging.......plz help?
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Kharicha
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Decrease the underrelaxation factors for:

temperature -> 0.7 body force -> 0.4
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Old   March 29, 2006, 18:04
Default Re: Energy eqn is nt converging.......plz help?
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Fernando
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Ra number so high ? > 10^6 ? Try getting a converged solution with g = -0.981 and after encreased it slowly.

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Old   March 30, 2006, 23:17
Default Re: Energy eqn is nt converging.......plz help?
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preethi
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hi on what basis we have to give the value of g?and why we "ve to give that much low value ?is there any thumb like rules to give this value?

fernando could you plz tell me how to approach further after getting converged sol say for g=-0.981????????

THX in advanse preethi
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