[Rui_27]

Hello to all,

I am simulating air-water two-phase flow in a serpentine-like channel, in transient regime, with the VOF method.

At some point, the simulation diverges without any apparent reason. (See image attached). Residuals are not increasing, courant number is ok, etc...

In fact, if I click "Calculate" again, the calculation restarts normaly... as nothing had happened, and the final results are perfectly fine.

This occurs both in win7/10 computers and in a linux based cluster from my faculty.

This is expecially annoying when I submit simulations in the cluster. When this happens the simulation stops and many times I am unable to restart it from the previous saved data file..

Does anyone had experience similar problem?

Thanks.

Rui