Modeling of a Turbulent Droplet-Laden Flow Behind an Obstacle
M. A. Pakhomov
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: numerical modeling, Reynolds stress transport model, turbulence, single obstacle, flow separation, flow structure
Abstract
The local flow structure in a turbulent gas-droplet flow behind a single obstacle has been studied numerically for different initial mass concentrations and diameters of dispersed particles. The effect of evaporating droplets flowing around a single square obstacle on the local averaged and pulsating flow structure and the dispersed phase propagation process has been analyzed. The profiles of averaged longitudinal velocity components of the gas and dispersed phases are similar to those for the single-phase flow regime. The gas velocity in the gas-droplet flow is insignificantly (less than 3%) higher than the corresponding value in the single-phase flow. The turbulence kinetic energy increases in approaching the obstacle. Maximum gas-phase turbulence was obtained on an obstacle of height h at x / h = -1÷0, and it is more than 50% higher than the turbulence kinetic energy before and after the obstacle.
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