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Indexed by:期刊论文

Date of Publication:2010-03-01

Journal:INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH

Included Journals:SCIE

Volume:25

Issue:1

Page Number:17-27

ISSN No.:1001-6279

Key Words:Three dimensional k-epsilon-A(p) model; Liquid-particle flow; Two-fluid model; Channel bend; Bed deformation; Curvilinear coordinates

Abstract:A three-dimensional k-epsilon-A(p) two-fluid turbulence model is proposed to study liquid-particle two-phase flow and bed deformation. By solving coupled liquid-phase and solid-phase governing equations in a finite-volume method, the model can calculate the movement of both water and sediment. The model was validated by water-sediment transport in a 180 degrees channel bend with a movable bed. The validation concerns two-phase time-averaged velocities, bed deformation, water depth, depth-averaged streamwise velocity, cross-stream bed profiles, and two-phase secondary flow velocity vectors. The agreement between numerical results and experimental results was generally good. The comparisons of the numerical results of different models show that the three-dimensional k-e-Ap two-fluid turbulence model has a relatively higher accuracy than one-fluid model.