Droplet Evaporation in a Gas-Droplet Mist Dilute Turbulent Flow behind a Backward-Facing Step

Water

Viktor I. Terekhov¹  Maksim A. Pakhomov¹ 

[1] Laboratory of Thermal and Gas Dynamics, Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Academician Lavrent’ev Avenue 1, 630090 Novosibirsk, Russia;

关键词: gas-droplet turbulent flow;    backward-facing step;    droplet vaporization and dispersion;    Eulerian modeling;    heat transfer;   

DOI  :  10.3390/w13172333

来源: DOAJ

【 摘 要 】

The mean and fluctuation flow patterns and heat transfer in a turbulent droplet-laden dilute flow behind a two-dimensional single-side backward-facing step are numerically studied. Numerical simulations are performed for water droplets, with the inlet droplet diameters d₁ = 1–100 μm; they have a mass fraction of M_L1 = 0–0.1. There is almost no influence of a small number of droplets on the mean gas flow and coefficient of wall friction. A substantial heat transfer augmentation in a droplet-laden mist-separated flow is shown. Heat transfer increases both in the recirculating flow and flow relaxation zones for fine, dispersed droplets, and the largest droplets augment heat transfer after the reattachment point. The largest heat transfer enhancement in a droplet-laden flow is obtained for small particles.

【 授权许可】

Unknown