SimScale CAE Forum

Spurs gears multiphase simulation with error

hello, I have a problem in The Courant number (CFL). In order to achieve this you need to decrease the time step.
The phase fraction of your multiphase simulation went out of bounds. How to set it up, can see the project at this link
, and I really appreciate the help of the solution so that I can run the simulation? can with pictures, thank you

Hi there, this is Fillia :smiley:

To begin with, I suggest you change the faces of the Velocity inlet and Pressure outlet:

Other than that, I noticed you have set the whole solid body as an MRF zone, however this is not the correct way for this kind of assignment. You can learn more about CAD preparation for projects with MRF region here: How to Prepare the CAD for Simulating Rotating Zones | SimScale

An additional cylinder should be included, that will be assigned as the Rotating zone. Check this tutorial for example:

Best regards,

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