Power numbers, Taylor numbers and Taylor vortices in viscous newtonian and non-newtonian fluids

Revisiting the stability of circular Couette flow of shear-thinning fluids

“…For power-law fluids, Sinevic et al [10] determined the onset of Taylor vortices by measuring the torque exerted by the fluid on the rotating inner cylinder. The results obtained by the authors for CMC solution and Carbopol solutions are reported on Fig.…”

Flow pattern and stability of pseudoplastic axial Taylor–Couette flow

“…Also, close agreement was obtained upon comparison with the exact results from linear stability analysis amid existence of multiple numerical solutions [14]. Further to mention, is the work of Sinevic et al [15] in which they determined the torque for both Newtonian and pseudoplastic fluids in TCF for both narrow-and wide-gap geometries. Results showed that the critical Taylor number is strongly dependent on the degree of pseudoplasticity.…”

“…It is evident that for values of 9a9)1, terms multiplied by a in Eq. (15) are dominated by the quadratic terms, and therefore, DF remains negative. In this case, no trajectory originating from a point with a finite distance from the origin can go off to infinity.…”

Experimental investigations of the stability limit of the helical flow of pseudoplastic liquids

“…In previous works [14,15] the Taylor number was defined on the basis of the apparent viscosity value at the inner rotating cylinder. It was concluded in [14] that this definition of Ta leads to the stability limit of Couette flow of pseudoplastic liquids consistent with the case of Newtonian fluids.…”