Modelling and simulation of particle re-suspension in a turbulent square duct flow

The ability of a Reynolds-averaged Navier-Stokes (RANS) approach, coupled with a Lagrangian particle tracking technique, to predict particle re-suspension in a high Reynolds number duct flow has been assessed for spherical particles over a range of sizes, with results compared with predictions based on large eddy simulation (LES). In general, there is reasonable agreement between the two techniques in regards to the locations where maximum re-suspension rates occur in the lower half of the duct, with both methods predicting the preferential re-suspension of smaller particles. The main difference between the two approaches is in the magnitude of the re-suspension rate, with RANS predicting a greater variability across the duct. These differences are most likely attributable to the method used for deriving instantaneous fluid velocities from RANS solutions.

• Type: Journal
• Year: 2011
• Where: CCE
• Authors: J. F. W. Adams, M. Fairweather, J. Yao
• Keywords: CCE 2011, RANS, Re-suspension Rate, Reynolds Number Duct, Software Engineering