Effects of particle fractions on the Bingham yield stress and viscosity of fine-coarse particle suspensions  

作　　者：DEY Litan JAN Chyan-Deng WANG Ji-Shang 

机构地区：[1]Department of Hydraulic and Ocean Engineering,National Cheng Kung University,Tainan 701,Chinese Taipei [2]Ecological Soil and Water Conservation Research Center,National Cheng Kung University,Tainan 701,Chinese Taipei

出　　处：《Journal of Mountain Science》2021年第11期2960-2970,共11页山地科学学报（英文）

基　　金：This work was financially supported by MOST 107-2221-E-006-029-MY3.

摘　　要：The rheological behaviors of highly concentrated fine particle suspensions(clay-silt-water mixtures)and coarse particle suspensions(coarse particles within a fine particle suspension)were investigated in this study.Experimental results demonstrated that the Bingham Fluid Model with two rheological parameters,Bingham yield stressand viscosity,wellcharacterized the rheological behavior of fine particle suspensions at shear rates between 4 and 20 s^(-1).The inclusion of coarse particles within a fine particle suspension induced an enhancement to the rheological parameters.The rheological parameters of a coarse particle suspension not only depend on its total particle fraction but also on its relative fine/coarse particle fractions.Empirical equations of these two parameters were proposed,quantitatively related to both fine and coarse particle fractions.Results indicated that the Bingham yield stress and viscosity are much more(an order larger)sensitive to changes in fine particle fraction than to changes in coarse particle fraction.

关 键 词：Coarse particle suspension Bingham Fluid Model Particle fractions Rheologicalparameters 

分 类 号：P642.23[天文地球—工程地质学] O35[天文地球—地质矿产勘探]