CONCENTRATION DISTRIBUTION OF SOLID PARTICLES IN THE COMPLETELY DEVELOPED TURBULENT FLOW IN A CHANNEL

The formation of regions with a higher concentration of solid particles in the completely developed turbulent flow in a channel with impermeable walls was investigated. A gas fl ow was simulated on the basis of nonstationary three-dimensional Navier–Stokes equations. The discrete-trajectory approach was used for simulation of the movement of particles. On the basis of the data of a direct numerical simulation, the distributions of the average and pulsating characteristics of the flow in the channel and the concentration distribution of the dispersed phase in it were determined. It was established that the formation of regions with a higher concentration of solid particles in the channel is due to the instantaneous redistribution of vorticity near its walls. The numerical-simulation data obtained are in qualitative and quantitative agreement with the corresponding results of physical and computational experiments.
   
Author:  K. N. Volkov and V. N. Emel′yanov
Keywords:  completely developed turbulent fl ow, solid particles, channel with impermeable walls, direct numerical simulation
Page:  185