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Solution divergence when energy equation is enable

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Old   November 27, 2012, 23:31
Red face Solution divergence when energy equation is enable
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Hi all,

I'm a new Fluent user. I'm running a reacting flow simulation with reactions disabled (cold flow). I started the simulation by solving the flow, species equations, k & epsilon. After the solution is stable; about 30000 + iterations, I turn on the energy equation. In about 100 iteration, the solution became divergence. I do a lot of trial & error by adjusting the under relaxation factor, but, it's not working..what should I do??

Please help me....thanks.
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