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Old   June 30, 2006, 21:30
Default Fatal overflow in multiphase
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When I use single phase in simulating tank filling,it converge well.But when I switch to multiphase,error appears: | ERROR #004100018 has occurred in subroutine FINMES. | | Message:| | Fatal overflow in linear solver.

Can any body tell me why?
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Old   July 1, 2006, 03:54
Default Re: Fatal overflow in multiphase
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The convergence fairy is stubborn in multiphase flows. Could be any of a myriad reasons.
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Old   July 3, 2006, 04:30
Default Re: Fatal overflow in multiphase
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You can try to reduce your timestep. Sometimes, with two fluids, I've worked with 1e-5. When the flow will be more stable, you can use a bigger timestep. However, it's better to obtain an initial value file, for example using first a 'zero equation' turbolence model, which is very robust.

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