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-   -   Energy eqn is nt converging.......plz help? (http://www.cfd-online.com/Forums/fluent/40310-energy-eqn-nt-converging-plz-help.html)

 preethi March 25, 2006 14:20

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

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 ??//

 Kharicha March 27, 2006 11:32

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

Decrease the underrelaxation factors for:

temperature -> 0.7 body force -> 0.4

 Fernando March 29, 2006 18:04

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

Ra number so high ? > 10^6 ? Try getting a converged solution with g = -0.981 and after encreased it slowly.

 preethi March 30, 2006 23:17

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

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????????