Liquid Hold up %

[motaleby]

Dear engineers
what's the formula and meaning of the Liquid Hold up %? Is it the percentage of pipe area occupied by liquid to the total pipe area?




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[ANT74]

You can not formulate it because it changes from flow patern to flow patern varying with different correlations.
Shortly, you can define liquid hold up as `fraction of an element of pipe that is occupied by liquid at some instant` it means volume of liquid to volume of pipe at instant and for a unit pipe length. It depends on flow pattern!!!

[motaleby]

thanks friend