粘性泥沙动水絮凝沉降数值模拟及影响因素

Simulation for fine sediment flocculating settlement in flowing water and its influential factors

基于扩散受限絮团聚集模型(DLCA模型),将絮凝沉降模型和水动力学结合,从三维的角度对动水中粘性细颗粒的絮凝沉降过程进行了计算机模拟.在此基础上,分析了有效碰撞系数、泥沙初始浓度和粒径对均匀沙和非均匀沙的落淤距离与分布的影响,初步研究了粘性细颗粒泥沙的絮凝沉降分形生长过程,并对絮凝体进行了图像处理.研究成果对黄河等高浊度细颗粒含沙水流的治理与处理有一定的理论和实际应用价值.

A simulation based on the diffusion limited cluster aggregation （DLCA） and three graphics technology for fine sediment flocculating settlement in flowing water is presented. With the simulation, we analyze the effects of particle effective collision probability, initial concentration and particle diameter on sedimentation distance and distribution. The floc fractal structure is analyzed by graphic technology. Research results in this paper have some theoretical and practical value for the control and treatment of the Yellow River high turbidity flow.