Quantum mechanics

Phase (matter)

Basis (linear algebra)

Computer science

Physics

Correlation

Mathematics

Flow (mathematics)

Geometry

Mechanics

International Journal of Heat and Mass Transfer

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.

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