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Time step in two-phase flow simulations

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Old   May 18, 2018, 06:14
Default Time step in two-phase flow simulations
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SAM
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Dear all
I am doing DNS of turbulent bubbly flows using CLSVOF. I just realized that by increasing the density ratio, the time step decrease proportionally. Can someone tell me the reason?
Thank you
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Old   May 18, 2018, 10:30
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Quote:
Originally Posted by hnemati View Post
Dear all
I am doing DNS of turbulent bubbly flows using CLSVOF. I just realized that by increasing the density ratio, the time step decrease proportionally. Can someone tell me the reason?
Thank you
You need both, a spatial and a temporal resolution. If you increase the one you have to increase the other too, to get a better accuracy of the result.
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