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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

On the multidimensional modeling of gas-liquid slug flows

Get access (open in a dialog) DOI: 10.1615/IHTC12.2400
6 pages

要約

The purpose of this paper is to present the results of a combined theoretical and numerical analysis aimed at developing a consistent multidimensional model of slug flows. Based on first-principle (including direct numerical) simulations of the intermittent flow of Taylor bubbles and liquid slugs, a modeling framework has been established for predicting local effects such as, the evolution of shape and velocity of Taylor bubbles, gas and liquid multidimensional velocity fields, bubble-induced turbulence, and others. It has been shown that the results of computer simulations agree well with the experimental data. The proposed methodology has been used to perform virtual experiments that allowed to formulate mechanistically-based closure laws for a multidimensional two-fluid model of slug flows, applicable to developing (in general, non-stationary) flows in various channel geometries. The overall model is capable of simulating varying flow conditions, up to 50-60% void fractions in vertical pipes with internal diameter in range 12 to 25 mm.