Measurement of viscosity of liquid in micro-crevice. (December 2015)

• Record Type: Journal Article
• Authors: Lv, Peng; Yang, Zihao; Hua, Zhao; Li, Mingyuan; Lin, Meiqin; Dong, Zhaoxia
• Is Part Of: Flow measurement and instrumentation. Volume 46:Part A(2015:Dec.)
• Page Start: 72
• Page End: 79
• Publication Date: 2015-12
• Subjects: Viscosity -- Micro-crevice viscometer -- Low shear rate -- Liquid; Fluid dynamic measurements -- Periodicals; Flow meters -- Periodicals; Fluides, Dynamique des -- Mesure -- Périodiques; Débitmètres -- Périodiques; 681.2805
• DOI: 10.1016/j.flowmeasinst.2015.08.007
• Languages: English
• ISSNs: 0955-5986

Abstract

Abstract: A measurement of viscosity and rheology of a liquid confined within tight space with scientific accuracy typically has been a challenge. In order to measure viscosity of the liquid in micro-crevice at low shear rate a micro-crevice viscometer (MCV) is developed by modifying an interfacial-viscometer. The viscosity of water and hydrocarbons (C10, C12, C14 and C16 ) was measured with the viscometer in this study. The results show that the viscosity measured at low shear rate by the micro-crevice viscometer and calculated with conventional methods has fine accuracy and repeatability when micro-crevice thickness is big and fixed. The liquid in small micro-crevice or confined within small space exhibit higher viscosity than bulk value and the viscosity should increase as the micro-crevice thickness decreases. Due to over-effect of h on viscosity calculation leads to water and hydrocarbons viscosity decrease as h decreases which do not indict the nature of the liquids in micro-crevice or confined within small space, a new calculating method based on influence of solid surface on liquid should be developed. Highlights: Due to effect of solid surface the liquid in small micro-crevice exhibit higher viscosity than bulk value, the viscosity increase as micro-crevice thickness decreases. The viscosity of the liquid in small micro-crevice calculated with conventional methods has fine accuracy and repeatability when micro-crevice thickness is big and fixed, but these methods cannot be applied for the liquid in small micro-crevice thickness. Due to over-effect of micro-crevice thickness on viscosity of liquid calculated with conventional methods deduced from physics do not indict the nature of the liquid in small micro-crevice a new calculating method based on colloid and surface science should be developed.