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Water 2017, 9(7), 474;

Dependence of Sediment Suspension Viscosity on Solid Concentration: A Simple General Equation

College of Water Sciences, Beijing Normal University, Beijing 100875, China
Author to whom correspondence should be addressed.
Received: 27 May 2017 / Revised: 24 June 2017 / Accepted: 26 June 2017 / Published: 28 June 2017
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In this study, a simple and new parametric equation is proposed that describes the relative viscosity of a suspension as a function of suspended solid concentration, covering a range from very dilute to highly concentrated states, based on Costa (2005). The proposed viscosity law depends mainly on the solid volumetric concentration and maximum packing fraction at which a regime transition occurs. Furthermore, the viscosity of dilute as well as a highly-concentrated kaolinite suspension (in excess of 40% and lower than 50%) was measured in a coaxial cylinder rheometer. The proposed formula shows a capability of fitting the measured bulk viscosity into the hyper-concentrated regime in the experiment. Finally, the proposed equation could also be found to show a good fitting relationship with published experimental results on partially crystallised Li2Si2O5 melt and partially melted granite with solid contents from 75% to 95%. View Full-Text
Keywords: viscosity; solid concentration; kaolinite; general equation viscosity; solid concentration; kaolinite; general equation

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Zhu, Z.; Wang, H.; Peng, D. Dependence of Sediment Suspension Viscosity on Solid Concentration: A Simple General Equation. Water 2017, 9, 474.

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