Article,

A theoretical basis for the Lockhart-Martinelli correlation for two-phase flow

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International Journal of Heat and Mass Transfer, 10 (12): 1767 - 1778 (1967)
DOI: 10.1016/0017-9310(67)90047-6

Abstract

Equations are developed in terms of the Lockhart-Martinelli correlating groups for the friction pressure gradient during the flow of gas-liquid or vapour-liquid mixtures in pipes. The theoretical development differs from previous treatments in the method of allowing for the interfacial shear force between the phases; some of the anomalies occurring in previous “lumped flow” models are avoided. Good agreement with Lockhart-Martinelli empirical curves are obtained. Simplified equations for use in engineering design are also given.

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