![]() The underlying knowledge of bubbles moving in fluids is an essential foundation for the design and optimization of process units (Clift et al., 1978). Gas-liquid two phase flow is frequently encountered in many industrial fields such as mineral, chemical, food, biochemical and waste water treatment. Keywords: Non-Newtonian fluid Bubble Viscosity distribution Shear-thinning effect. Within the experimental range, similar viscosity distributions of liquids around a rising bubble were found: a hollow cylindrical low viscosity region around the bubble wake and a high viscosity region in the central bubble wake. Results indicated that the specific viscosity (non-dimensionalized by η 0) decreases with the increase in CMC solution concentration due to a shear thinning effect. The effect of the concentration of CMC solutions on the viscosity distribution around a bubble and the coupling relations between the viscosity field, flow field and shear stress field were also studied. The viscosity distribution of the liquid around a rising bubble in carboxymethyl cellulose (CMC) aqueous solutions was measured experimentally by particle image velocimetry (PIV). E-mail: of Reactions and Process Engineering, Nancy-Université, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy Cedex, France IState Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. Shaobai Li I Youguang Ma I Taotao Fu I Chunying Zhu I Huaizhi Li II ![]() The viscosity distribution around a rising bubble in shear-thinning non-newtonian fluids FLUID DYNAMICS HEAT AND MASS TRANSFER AND OTHER TOPICS
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