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visualize free-surface, VOF

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Old   April 13, 2009, 04:10
Default visualize free-surface, VOF
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Radiatn
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In star-ccm+ they suggest VOF=0.5 to visualize the free surface for immiscible fluids . How about other codes (Fluent, Flow3D, CFX, Tidal, OpenFoam, etc) ? Is the same VOF=0.5 chosen to represent the free-surface? What does VOF=0.5 mean? Isn't it a surface where it is 50% air and 50% water?
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Old   April 13, 2009, 07:33
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It is an interpolation. 50% means that the cell has 50% water and 50% air so the free surface is located in the middle.

I think considering vof=0.5 is the normal thing to do.
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