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Old   November 25, 2002, 14:50
Default VOF again
  #1
CFD Newbie
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Hi, I'm solving a liquid film flow with VOF, I have reached a time step of 10^-7 but would like to know if I can do something to have a faster convergence.

Thanks again

CFD Newbie

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Old   November 26, 2002, 08:05
Default Re: VOF again
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CFD_MAN
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Hi CFD Newbie, I got this script from an Australian friend. And it works very well for my case. See how the time step is changed as converges. If at any stage it diverges, you have to stick with the time step (or u have to change the UR, discretization scheme, models, adaptation and so on..) just b4 it diverges. For your case, start with 1e-7. At any time step, you can prolong your calculation.

CFD MAN -- file read-case-data try1 q solve set time-step 1e-4 q dual-time-iterate 10 5000 q wcd 10ts_1e-4 q solve set time-step 2e-4 q dual-time-iterate 10 5000 q wcd 10ts_2e-4 .... ... .. . make it steady if it converges all the way
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Old   November 26, 2002, 17:51
Default Re: VOF again
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Thanks a lot CFD_MAN

I'll give it a try!!!! and let you know what happens.

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