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Numerical Investigation of Degassing Behavior of Highly Viscous Non‐Newtonian Fluids under Stirring
Author(s) -
Ma Qianli,
Shang Chunli,
Zhang Guojun,
Fang Haisheng
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900269
Subject(s) - shear thinning , non newtonian fluid , rheology , newtonian fluid , viscosity , mechanics , dilatant , shear (geology) , bubble , materials science , eulerian path , thermodynamics , composite material , physics , lagrangian , mathematical physics
A method for accelerating bubble removal in non‐Newtonian liquids by forced stirring is proposed. Numerical simulations based on an Eulerian‐Eulerian multiphase model are performed to test its feasibility for various liquids including shear‐thickening, shear‐thinning, and Newtonian ones. Effects of the rotating speed of the stirrer and rheological properties of liquids on the degassing efficiency are evaluated, and the influencing mechanisms are analyzed in detail. The feasible regions of degassing in shear‐thinning liquids covering a certain range of viscosities are determined, from which one can easily decide the optimal rotating speed given the viscosity of liquids. The results provide a new idea of efficient degassing in shear‐thinning liquids for researchers and engineers.