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    Multiple Effects of the Second Fluid on Suspension Viscosity

    Year: 2015

    Journal: SCIENTIFIC REPORTS, Vol. 5, p -, 20170208

    Authors: Zhang, Jie; Zhao, Hui; Li, Weifeng; Xu, Menghan; Liu, Haifeng

    Organizations: E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China

    Previous research has shown that adding a small amount of a second immiscible fluid to particulate suspension can result in a significant influence on viscosity. In this study, the effects of the second fluid addition over a small dosage range on the rheological properties of particle suspension were investigated. As the dosage of the second fluid was increased, the viscosity and yield stress initially decreased then increased and finally decreased again. The microstructure of the suspension was observed using a confocal laser scanning microscope (CLSM) and showed three different states with the increasing dosage of the second fluid: a dispersive sate, cluster state and cell state in sequence. The presence of these states interpreted the non-monotonic trend of viscosity and yield stress in the suspensions.