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Reversed flow in faces on pressure outlets

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Old   October 22, 2021, 05:22
Default Reversed flow in faces on pressure outlets
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I am simulating a 1-meter height 0.15-meter diameter of a cylindrical bubble column reactor. where the liquid is the primary phase and the air is the secondary phase. After initialization air is patched from 0.3 to 1 meter of column remaining water is filled initially from 0 to 0.3 meters of the column. While running the simulation, a message is shown that reversed flow in faces on pressure outlet in each iteration. Why is showing? please explain it?
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air-water, bubble columns, multiphase flow

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