A particle-laden turbulent flow in a square duct is predicted using large eddy simulation (LES). The simulation is performed for a Reynolds number of 35,500, and correctly predicts the existence of secondary flows and their effects on the mean flow. The results are also in good qualitative agreement with experimental data obtained at different Reynolds numbers. One-way coupling is assumed between solid particles and the fluid, and a particle equation of motion, including Stokes drag, lift, buoyancy and gravity force terms, solved using a Lagrangian particle tracking technique. Three sizes of particle (1, 50 and 100 μm) are considered, and results demonstrate that size has a significant effect on particle dispersion and deposition in the duct flow. As particle size increases, therefore, they tend to settle on the floor of the duct, with less dispersion in the fluid phase. The study demonstrates the usefulness of LES for nuclear waste processing applications since secondary flows occur in many practically-relevant flows, and since it is desirable that the two-phase waste mixture is kept as homogeneous as possible to prevent, or at least discourage, the settling out of solid particles to form a bed which can promote pipe blockages.
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The 11th International Conference on Environmental Remediation and Radioactive Waste Management
September 2–6, 2007
Bruges, Belgium
Conference Sponsors:
- Nuclear Division and Environmental Engineering Division
ISBN:
978-0-7918-4339-0
PROCEEDINGS PAPER
Investigation of Particle-Laden Flow in a Straight Duct Using Large Eddy Simulation
M. Fairweather,
M. Fairweather
University of Leeds, Leeds, UK
Search for other works by this author on:
J. Yao
J. Yao
University of Leeds, Leeds, UK
Search for other works by this author on:
M. Fairweather
University of Leeds, Leeds, UK
J. Yao
University of Leeds, Leeds, UK
Paper No:
ICEM2007-7029, pp. 1119-1124; 6 pages
Published Online:
May 29, 2009
Citation
Fairweather, M, & Yao, J. "Investigation of Particle-Laden Flow in a Straight Duct Using Large Eddy Simulation." Proceedings of the The 11th International Conference on Environmental Remediation and Radioactive Waste Management. 11th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B. Bruges, Belgium. September 2–6, 2007. pp. 1119-1124. ASME. https://doi.org/10.1115/ICEM2007-7029
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