Deposition of droplets onto a wall from a two-phase turbulent unsteady flow with peripheral twist
M.A. Pakhomov, V.I. Terekhov
S.S. Kutateladze Institute of Thermophysics named SB RAS, Novosibirsk, Russia
Keywords: gas-droplet flow, swirling, numerical modeling, Reynolds stress transfer model, Eulerian and Lagrangian approaches, droplet deposition
Abstract
Numerical modeling of the process of deposition of water droplets in a turbulent pulsed two-phase flow in a cylindrical channel with peripheral swirl was carried out when varying the initial mass concentration of water droplets using the Euler description. The gas phase is described by a system of 3D URANS equations taking the influence of particles on transport processes in the carrier phase. Gas phase turbulence is calculated using an elliptical model of Reynolds stress transfer, also written taking into account the influence of the dispersed phase. The maximum concentration of the precipitated liquid was obtained in the pulse frequency range ƒ = 100 - 150 Hz (Strouhal number Sr = 0.4 - 0.6).
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