Investigations of Turbulence Modulation in Turbulent Particle Laden Flows

Abstract

This paper presents the results of experimental and numerical analyses of high particle laden turbulent jlows. The dispersed phase consists of non-reacting solid mono-dispersed particles with variable diameter between 60pm and 150oj.m. Experiments using Laser Doppler Anemometer (LDA) and Phase Doppler Anemometer (PDA) show in agreement with earlier investigations that small particles attenuate turbulence while large particles enhance turbulence. More detailed investigations are, however, needed to clearly identifi and quanti3 such influences. In order to obtain preliminary information about the pe$ormance of the k-E model, mostly used for the majority of the numerical models, in predicting the physical features of modulation, some numerical calculation results obtained by use of Euler / Lagrange method and a modified version of the k-E model are compared to the experimental data.