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Unstead vs Steady for VOF

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Old   August 11, 2008, 08:22
Default Unstead vs Steady for VOF
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Hi all!

I am simulating the free surface by using VOF model for 3D, however I face a problem is:

From Initial, running with Steady, the solution gives a error.

Meanwhile, running with Unsteady is smooth solution.

When I switch from Unsteady into Steady, the Continuity Residual is very high (More than 0).

Everyone can suggest for me the reason and how to solve this, because I need Steady solution to check result quickly.

Thank you all!

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Old   August 11, 2008, 08:41
Default Re: Unstead vs Steady for VOF
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It is recommended to run VOF model only in unsteady state since it involves tracking of the interface with every timestep. Steady state VOF solution has very little significance. To obtain a steady state solution, you can run an unsteady problem till you reach steady state.
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