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Wall Shear Rates in Circular Couette Flow of a Herschel-Bulkley Fluid
The objective of this work is to study quantitatively the errors introduced by the standard Newtonian and power-law assumptions used in the determination of the material properties of viscoplastic fluids from circular Couette experiments. The steady-state circular Couette flow of a Herschel-Bulkley fluid is solved assuming that the inner cylinder is rotating at constant speed while the outer one is fixed. Analytical solutions are presented for certain values of the power-law exponent. It isdoi:10.1515/arh-2009-0011 fatcat:hndrllplv5ddtiho6wjjb2s6jy