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Characterisation of two-phase flow in plate columns
Book chapter   Open access

Characterisation of two-phase flow in plate columns

G.E. Ho, R.L. Muller and R.G.H. Prince
Distillation, pp.2:10-2:21
Institution of Chemical Engineers
1969
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Abstract

Methods based on two-phase flow analysis are described which are used to characterise the flow regimes commonly observed in perforated plate columns. A model for the cellular foam regime based on liquid flow in a structure of regular pentagonal dodecahedra has been described. This shows the relationship between gas superficial velocity, gas hold-up fraction, and bubble size and is used to explain the break-down of cellular foam to froth. The spray regime has been described as a fluidised bed of drops produced by liquid break-up in pulsating vapour jets. Drop stability and terminal velocity considerations are used to predict the limits of the spray regime. The transition to froth is explained in terms of the fluidisation model.

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