A three-dimensional k-E >-k (p) model in curvilinear coordinates for sediment movement and bed evolution

作者：Shen YongMing^*; Liu Cheng

来源：Science in China - Series E: Technological Sciences , 2009, 52(4): 1090-1100.

DOI：10.1007/s11431-008-0234-2

• curvilinear coordinates
• three-dimensional k-epsilon-k(p) model
• two-fluid model
• solid-liquid flows
• channel bend
• bed load
• bed evolution
• trajectory

To aim at the substitution of the magnitude and direction of water flow movement near bed for those of bed load transport in solid-liquid two-phase one-fluid model, and to simulate the effect of secondary flow on transverse bed load transport in channel bends and the effect of bed slope on bed load transport in a better way, a three-dimensional k-E >-k (p) solid-liquid two-phase two-fluid model in curvilinear coordinates is solved numerically with a finite-volume method on an adaptive grid for studying water- sediment movements and bed evolution in a 120A degrees channel bend. Numerical results show that the trajectories of solid-phase deviate from those of liquid-phase in the channel bend, and the deviation increases with the increase of the particle diameters. The calculated bed deformation by the k-E >-k (p) model is in better agreement with measured bed deformation than those by one-fluid model. It is proved that the k-E >-k (p) model can simulate the effect of secondary flow on lateral bed load transport with the higher accuracy than the one-fluid model.

• 出版日期2009-4
• 单位海岸和近海工程国家重点实验室; 大连理工大学; 珠江水利委员会珠江水利科学研究院