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measure the water depth in cylinder

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Old   May 29, 2021, 17:32
Default measure the water depth in cylinder
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Hi all
How can I measure the water depth in a cylinder in the two-phase model in the CFX post?
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Old   May 30, 2021, 02:57
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Glenn Horrocks
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Define "depth". Where the free surface is along a line? Volume of water? Averaged free surface height on some defined plane?

The volume of water is easy - volumeInt(Water phase)@Domain
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Old   May 31, 2021, 01:23
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Create a surface where the phase volume fraction is 0.5. Assuming your z-coordinate is along the vertical axis, you can then get the average z value at your surface and subtract the bottom z coordinate.
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Old   June 15, 2021, 13:36
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Quote:
Originally Posted by AtoHM View Post
Create a surface where the phase volume fraction is 0.5. Assuming your z-coordinate is along the vertical axis, you can then get the average z value at your surface and subtract the bottom z coordinate.
Thank you for your kind answer; I wanted to do it with an expression, not manually
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Old   June 15, 2021, 13:37
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Quote:
Originally Posted by ghorrocks View Post
Define "depth". Where the free surface is along a line? Volume of water? Averaged free surface height on some defined plane?

The volume of water is easy - volumeInt(Water phase)@Domain
Thank you for your kind answer; I wanted to find where the volume fraction is 0.5 in line,
and do it with an expression
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Old   June 15, 2021, 20:16
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The average depth of water is easy: volumeInt(Water phase)@domain/area()@Bottom Surface

Is that useful? If not, please define exactly how you define the depth. There are many ways of measuring the depth. Consider a swimming pool - how deep is it? (It depends on how you measure it)
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Old   June 16, 2021, 02:43
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Quote:
Originally Posted by hm____reza View Post
Thank you for your kind answer; I wanted to do it with an expression, not manually

Thats easily implemented in a function and Glenn already spoiled part of it. You can do this!
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