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Time step size in VOF implicit

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Old   July 28, 2013, 01:50
Default Time step size in VOF implicit
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I am new user in CFD.
I am modeling in VOF multiphase. In vof panel with activating the implicit, the courant number is deactive.
In this case, how can i define Time step size?
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Old   July 28, 2013, 16:00
Stephan Langenberg
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There is an universal equation in the users guide. In order to calculate your iteration to the timestep.

In my eyes you could test 3 cases (like 0,1 sec; 0,01 and 0,001). The residuals should give a first hint, if a time step size fits or not.

A general answer for your case isn't that easy. Maybe test 3 step sizes?

Here a discussion (maybe helpfull): Time step size and max iterations per time step
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