Solid particle spreading in gas-dispersed confined swirling flow. Eulerian and Lagrangian approaches
M.A. Pakhomov and V.I. Terekhov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mails: pakhomov@ngs.ru, terekhov@itp.nsc.ru
Keywords: two-phase swirling flow, solid particles, flow separation, numerical simulation, model of Reynolds stress transport, Eulerian and full Lagrangian descriptions
Pages: 325–338
Abstract
Dynamics
of a disperse phase in a swirling two-phase flow behind a sudden tube expansion
is simulated with the aid of Eulerian and full Lagrangian descriptions. The
carrier phase is described by three-dimensional Reynolds averaged Navier–Stokes
equations with consideration of inverse influence of particles on the transport
processes in gas. The velocity profiles calculated using these two
approaches are practically the same. It is shown that the main difference
between the Eulerian and Lagrangian approaches is presented by the
concentration profile of the dispersed phase. The Eulerian approach
underpredicts the value of particle concentration as compared with the
Lagrangian approach (the difference reaches 15-20 %).
The dispersed phase concentration predicted by the Lagrangian approach agrees
with the measurement data somewhat better than the data obtained through the
Eulerian approach.
DOI: 10.1134/S0869864317030015
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