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-   -   Fatal overflow in multiphase (http://www.cfd-online.com/Forums/cfx/22793-fatal-overflow-multiphase.html)

Jason June 30, 2006 21:30

Fatal overflow in multiphase
 
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?

Joe July 1, 2006 03:54

Re: Fatal overflow in multiphase
 
The convergence fairy is stubborn in multiphase flows. Could be any of a myriad reasons.

lu July 3, 2006 04:30

Re: Fatal overflow in multiphase
 
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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