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How to make a region to patch a bubble

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Old   December 30, 2015, 12:11
Default How to make a region to patch a bubble
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yusuke uchihashi
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If you answer my question, I really appreciate your kindness.

My question; I can't make a region to patch a bubble in the most finest grids.

I study bubble dynamics by using VOF method.
To meke the calculation cost low I used three types grids like Figure.1.
To make the grids I used adjust option in Fluent.

Thank you for your reading.
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Old   December 30, 2015, 14:20
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Erdem Kaya
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Just an idea, you can add an inlet at below of finer grid, you can define only air phase that inlet. And mass-flow (or velocity) inlet is bigger than 0 for a short time.

Or you can add different zone in design modeler inside finer grid zone. Similar with this:
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