FORCE BALANCE IN A TURBULENT PARTICULATE CHANNEL FLOW

Turbulent flows of 70 mu m copper particles and 50 mu m glass particle s in a channel are considered and investigated by large eddy simulatio ns. Only the influence of the background turbulence on the motion of p articles is considered and possible modifications of the structure of turbulence due to motion of particles are not accounted for. Mean velo city profiles and RMS levels are presented and are found to be in good agreement with earlier simulation data in literature. Differences bet ween the statistical behavior of the two particle types are presented and discussed. The statistical correlations are used for a detail stud y of the interphase forces. The dominant contributions in the streamwi se and in the wall-normal directions are pointed out. (C) 1998 Elsevie r Science Ltd. All rights reserved.