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A COMPARISON OF MOMENTUM, EULERIAN FRACTIONS AND δ-APPROXIMATION METHODS FOR MODELLING OF TWO-PHASE TURBULENT FLOWS WITH PHASE TRANSITIONS

DOI: 10.1615/ICHMT.2012.CHT-12.260
pages 409-426

Artur R. Avetissian
Nuclear Safety Institute of the Russian Academy of Sciences, Moscow, Russia

Gennady A. Philippov
Russian Academy of Sciences; All Russian Nuclear Power Engineering Research and Development Institute, Cosmonaut Volkov Str. 6a, 125171 Moscow, Russia

Abstract

In the paper we present the comparison of three Eulerian approaches (fractions, moments and δ -approximationton methods) to solve the kinetic equation for the probability density function (PDF) of dispersed phase mass distribution for modeling of two-phase turbulent flows with phase transitions. The results of two-dimensional computations are presented and compared with experimental data for transonic flows in flat and round nozzles in the case of both the absence and the presence of initial droplets supplied to the nozzle inlet. Methods under consideration compared in view of some exact solutions of kinetic equation. The advantages and disadvantages of each method are discussed.

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