Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7061287 | Journal of Non-Newtonian Fluid Mechanics | 2015 | 5 Pages |
Abstract
A non-colloidal particle suspension is studied in shear, and it is found that shear thinning takes place at a much higher Peclet number than in colloidal suspensions. In a steady shear-rate flow, the suspension viscosity increases and reaches a steady value when a critical strain is achieved. This critical strain is independent of the shear rate, and decreases with increasing particle concentration. It is proposed that the development of a shear-induced structure of particles, which grows when the shear rate decreases, is account for the increase of viscosity. The shear thinning in a non-colloidal suspension may not be due to Brownian motion, in contrast to colloidal suspensions.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Yuan Lin, Nhan Phan-Thien, Boo Cheong Khoo,