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VF Phase does not converge

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Old   April 21, 2017, 21:15
Default VF Phase does not converge
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nashim
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Hi, I am modelling cavitation in a t-junction pipe. All of my residuals converge apart from the vf phase which plateaus.





Why does it not converge?

EDIT: could it be due to that fact I am running this as steady ?
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Old   April 24, 2017, 02:44
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Something that you should find out, before looking in other details, is that whether your problem has steady state solution or not. For example, filling a tank has no steady state solution, and water flow in a tank with an outlet might have a SS solution. I don't know your problem's details, but I don't think it has a SS solution.

Then, I would make sure I have correct boundary conditions, and initial condition (correct patching of the domain if needed for the second phase). Try to reduce the volume fraction under-relaxation factor to something around 0.25, and see if you notice a change or not.
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Old   April 24, 2017, 04:29
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Hi, yes it does converge when ran transiently, agreed, this system is not in a steady state.
Thank you for the response
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cavitation, convergance, mixture model

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