MECHANISMS OF PARTICLE DISPERSION AND DEPOSITION IN A TURBULENT SQUARE DUCT FLOW

6th International Symposium on Turbulence and Shear Flow Phenomena

Jun Yao ; Michael Fairweather

PID  :  127709

来源: CEUR

【 摘 要 】

Particle dispersion in a square duct flow is studied usinglarge eddy simulation combined with Lagrangian particletracking under conditions of oneway coupling.The flowhas a bulk Re = 250k, with six particle sizes ranging from 5to 1000 m examined. For the particles, predictionsdemonstrate that secondary flows within the duct dominatesmall particle dispersion, and result in a uniform distribution,whilst gravity promotes the deposition of large particles onthe duct floor. A detailed analysis of the influence of theflow on particle distribution is provided through