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Numerical simulation of turbulent swirling gas-dispersed flow behind a sudden tube expansion

Numerical simulation of turbulent swirling gas-dispersed flow behind a sudden tube expansion Abstract The mathematical model is developed and the swirling two-phase flow behind a sudden tube expansion is simulated numerically using the model of Reynolds stress transport. The gas phase is described by the threedimensional RANS-equations taking into account the back effect of particles on transport processes in gas. To calculate the dispersed phase dynamics in a swirling confined flow, the Euler approach are used. It is found that with an increase in size, the particle are not involved into the separated flow and keep a positive value of the averaged axial velocity along the computational domain. Due to inertia of particle, the zone of reverse flows for the dispersed phase is noticeably smaller than the recirculation zone of gas phase. Performance of the developed mathematical model for description of the swirling two-phase flows in the presence of detachment areas is shown. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Numerical simulation of turbulent swirling gas-dispersed flow behind a sudden tube expansion

Thermophysics and Aeromechanics , Volume 22 (5): 12 – Sep 1, 2015

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Publisher
Springer Journals
Copyright
2015 Pleiades Publishing, Ltd.
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/S086986431505008X
Publisher site
See Article on Publisher Site

Abstract

Abstract The mathematical model is developed and the swirling two-phase flow behind a sudden tube expansion is simulated numerically using the model of Reynolds stress transport. The gas phase is described by the threedimensional RANS-equations taking into account the back effect of particles on transport processes in gas. To calculate the dispersed phase dynamics in a swirling confined flow, the Euler approach are used. It is found that with an increase in size, the particle are not involved into the separated flow and keep a positive value of the averaged axial velocity along the computational domain. Due to inertia of particle, the zone of reverse flows for the dispersed phase is noticeably smaller than the recirculation zone of gas phase. Performance of the developed mathematical model for description of the swirling two-phase flows in the presence of detachment areas is shown.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Sep 1, 2015

References