VELOCITY AND SUSPENSION CONCENTRATION IN SEDIMENT-MIXED FLUID
VELOCITY AND SUSPENSION CONCENTRATION IN SEDIMENT-MIXED FLUID作者机构：Professor Physics and Applied Mathematics Unit Indian statistical Institute Calcutta-700 108 India. Project Fellow Flume Laboratory Physics and Applied Mathematics Unit Indian Statistical Institute Calcutta-700 108 India.
出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))
年 卷 期：2002年第17卷第3期
页 面：220-232页
学科分类：08[工学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程]
主 题：Sediment suspension Viscosity Turbulent shear stress Hindered settling Velocity and concentration profiles
摘 要：The present paper is focussed on the effects of viscous and turbulent shear stresses on both vertical velocity and concentration distributions in large suspension of sands. When the flow carries large amount of sediments in suspension, the properties of fluid mixture are changed in terms of modified viscosity, density and fall velocity, and hence the flow characteristics. Theoretical models have been developed for both velocity and concentration profiles, taking into account the viscous and turbulent shear stresses, which are the function of volumetric concentration. Comparison of theoretical models with experimental data reveals that (i) the modified velocity and concentration profiles agree well with the observed data for high suspension, (ii) the higher the sediment suspension, the smaller the von-Karman constant, and (iii) sediment diffusion coefficient is less than momentum diffusion coefficient for fine sands in suspension.
同方期刊数据库