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The effect of dispersed phase on flow structure in a turbulent two-phase swirling flow downstream of a pipe sudden expansion

DOI: 10.1615/ICHMT.2015.THMT-15.1200
pages 559-562

Viktor I. Terekhov
Kutateladze Institute of Thermophysics, Laboratory of Thermal and Gas Dynamics, Russian Academy of Sciences, Siberian Branch, 630090,1, Acad. Lavrent'ev Avenue, Novosibirsk, Russia; Novosibirsk State Technical University, K. Markx av., 20, Novosibirsk, 630073, Russia

Maksim A. Pakhomov
Kutateladze Institute of Thermophysics, Laboratory of Thermal and Gas Dynamics, Russian Academy of Sciences, Siberian Branch, Lavrent'ev Avenue, 1, 630090, Novosibirsk, Russia


The mathematical model of the swirling two-phase flow behind a sudden pipe expansion is developed and numerical simulation performs using the model of Reynolds stress transport. The gas phase is described by the 3D RANS equations with consideration of the back effect of particles on transport process in the gas phase. The Eulerian approach is used for simulating the dispersed phase dynamics in a swirling confined flow. It is determined that with an increase in size, the particle are not involved into the separated flow and keep a positive value of the mean axial velocity within the computational domain. The zone of the recirculation flow of the dispersed phase is significantly smaller due to the inertia of particles as that one for gas phase. The efficiency of the author's mathematical model developed for description of the swirling two-phase flows in the presence of separated zones is shown.

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