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-   -   Floating Point Error (https://www.cfd-online.com/Forums/fluent/44742-floating-point-error.html)

Phil May 18, 2007 06:50

Floating Point Error
 
Hi there,

I'm running a ~950000 cell combustion calc, and after a little while of the residuals converging nicely(as with 650k model), SUDDENLY the residuals shoot up and the turbulent viscosity ratio starts being limited in more and more cells. Eventually I get a message saying floating point error and the simulation stops running. Has anyone experienced this before?

Any help would be very much appreciated.

Thanks Phil

KW May 21, 2007 16:01

Re: Floating Point Error
 
Have you try to coarsen your grid? Sometimes in my simulation a fine grid might cause error message like this

Prasad Dudhgaonkar May 22, 2007 15:38

Re: Floating Point Error
 
I's sure you wouldn't have missed reducing under-relaxation factors.


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