基于SPH法的水沙二相流模拟研究进展  

Research Progress of Sand-Water Two Phase Flow Based on SPH Method

作　　者：王秀伶[1] 关见朝[2] 樊云 

机构地区：[1]中央民族大学教育学院 [2]中国水利水电科学研究院 [3]长江水利委员会长江三峡水文水资源勘测局

出　　处：《人民黄河》2014年第2期23-25,29,共4页Yellow River

基　　金：国家自然科学基金资助项目(51209232);中国水利水电科学研究院科学研究专项(泥集1203;1340);"十二五"国家科技支撑计划项目(2012BAB04B02;2013BAB12B02)

摘　　要：介绍了水沙二相流运动的研究现状和SPH法基本原理,阐述了在水沙运动模拟中引入SPH法的可行性,总结了基于SPH法的水沙二相流模拟技术研究进展情况。认为:①通过离散含沙量对流扩散方程,可建立悬沙浓度变化SPH模型,据此可求解从小到大不同尺度的非均匀挟沙水流的含沙量变化,给出"含沙量粒子"的时空变化信息;②基于质点动力学,可建立悬沙粒子运动SPH模型,据此可求解泥沙颗粒在非均匀水流中的小尺度运动方程,给出水沙二相流的时空变化信息。但是,悬沙浓度变化SPH模型的局限在于"含沙量"实质上还是时空平均特征;悬沙粒子运动SPH模型的局限在于目前它只适用于求解SPH粒子总量较少的流动问题。Abstract： The present research of water-sand two-phase flow was described. The basic principles of SPH method were presented, and the feasibility of introducing SPH method into the simulation of sand-water motion was expounded. A systematic illustration of the development of SPH method was given, and the study on sand-water two-phase flow by SPH method was summarized. The results show that： a）The suspended load concentration model can be developed based on the discrete convection-diffusian equation of suspended load, and the suspended load concentration SPH model can be established, by which the concentration variation of non-uniform suspended load can be calculated from small scale to large scale, and the temporal information of the ＂suspended load concentration particle＂ can be extracted; b）Based on particle dynamics, the suspended load particle SPH model can be developed, which can be used to simulate the sand particle＇ s motion in a small scale, and provide the temporal information of water-sand two phase flow. The limitation of suspended load particle model is that the concentration is still a temporal average feature, and the sus- pended load particle model can only be used when there are a few SPH particles.

关 键 词：数值模拟 SPH法 水沙二相流 

分 类 号：TV142.3[水利工程—水力学及河流动力学]