| A three dimensional k-ε-A_p model for water-sediment movement |
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| 基金项目： | sponsored by the National Natural Science Foundation of China under Grant No.50839001;;sponsored by the National Natural Science Foundation of China under Grant No.50909110;;sponsored by the National Basic Research Program of China under Grant No.2005CB724202;;sponsored by the Natural Science Foundation of Guangdong Province,China under Grant No.9151061101000001 |
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| 摘 要： | A three-dimensional k-ε-Ap 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° 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-ε-Ap two-fluid turbulence model has a relatively higher accuracy than one-fluid model.
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| 关 键 词： | Three dimensional k-ε-Ap model Liquid-particle flow Two-fluid model Channel bend Bed deformation Curvilinear coordinates |
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