The purpose of this study is to establish the high-accurate prediction method of particle separation in a cyclone
separator. Numerical simulation of the swirling flows in a cyclone separator is performed by using a large eddy
simulation (LES) based on a Smagorinsky model. The validity of the simulation and the complicated flow
characteristics are discussed by comparison with experimental results. Moreover, particle motions are treated by a
Lagrangian method and are calculated with a one-way method. A performance for particle separation is predicted
from the results of the particle tracing. As results of our investigation, the influences of the inserted height of the
outlet pipe on the performance for particle separation of cyclone separator are shown.
Keywords: cyclone separator, swirling flow, particle motion, large eddy simulation