宾汉剪力的变化对紊流区高含沙水流性质的影响  

Influence of the Variation of Binghan Shear Stress on the Property of Hyper-concentration Flow in a Turbulent Region

作　　者：陈立[1] 

机构地区：[1]武汉水利电力大学河流工程系

出　　处：《武汉水利电力大学学报》1994年第2期185-190,共6页Engineering Journal of Wuhan University

摘　　要：根据管道的试验结果，分析了紊流区高含沙水流从宾汉体变为牛顿体的过程和机理，同时，宾汉剪力的改变使得受其支持而不下沉颗粒的最大粒径相应改变，水流在伪一相流、两相流间变化，对此，本文也作了分析．In hyper-concentration turbulent flow, Bingham shear stress (τBT) changes with the increase of Renolds Ntunber (RemT ) (reficcting the tarbulcnt intensity of the now). The vartahon of τBT makes the reological Property of the flow alternate between Bingham model and Newtoninn model. It also results in the change of the concentration (βT) of neating porticlcs which don't settle down just because of the support of the network of flocculation structure. When βT≥90%, the anew is a pseudo-one-phase flow, otherwise, the flow is a two-ptiasc flow.

关 键 词：含沙水流 两相流 湍流 

分 类 号：TV143.6[水利工程—水力学及河流动力学]