基于Euler模型的水平流对底沙的输运过程模拟

基于液固两相流动的Euler双流体模型,结合颗粒动力学理论,对颗粒相（沙）进行拟流体化处理,对近岸水域水平流环境下的泥沙起运进行了数值模拟研究。研究结果表明：随着水平射流的不断推进,水平射流对底层沙的影响范围与深度不断增大,导致水平流对底层沙的起运和输送过程显著。水平流的速度越快,起运与输送作用越强烈与迅速。水平流的入射高度与底层沙表面之间的距离越小,水平流对底沙的扰动、起运过程越明显。研究结论可为研究海床的冲刷机理、航道回淤疏浚等提供一定的参考依据。

Simulation of Horizontal Flow and Bed-Load Transports Process based on the Euler Model

Horizontal flow and bed-load transports process simulation were carried out based on liquid-solid two-phase flow of the Euler model and particle kinetic theory with the particle phase（sand） for pseudo-fluid treatment.The results showed that the effect of horizontal flow on the bed-load increased with the contin-uous advancement of the jet,so that the departure and delivery process of the bed-load became significantly.In addition,the departure and transport process became increasingly intense and rapid as the growing rate of horizontal flow.The departure process was very obvious when the distance of horizontal flow to the surface of bed-load was small.The results obtained in this paper can provide references for the studies of the mechanism of sea-bed erosion,channel dredging and other deposition.