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A correlation is developed to predict entrainment rate for the air-water system on sieve trays operating in the spray regime. The correlation utilizes liquid holdup on the tray as a correlating parameter and is successful in correlating entrainment data for a wide range of tray parameters and gas and liquid loadings. The correlation is extended to account for the effect of system physical properties and is shown to provide predictions of entrainment rate which are in encouraging agreement with the limited experimental data available for systems other than air-water.In this form the correlation is of immediate use to the tray designer in predicting entrainment rates on sieve trays operating in the spray regime.

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