Symmetry breaking phenomena of purely viscous shear-thinning fluid flow in a locally constricted channelTernik, Primož (Avtor) bifurcationinelastic shear-thinning fluidCarreau-Yasuda modelnumerical modellingThe goal of a present study is to investigate the effects of generalized Newtonian fluids on the threshold of the transition from flow symmetry to its asymmetry for the flow through a locally constricted channel. We consider purely viscous shear-thinning fluid and compare it with the Newtonian fluid. Fluid flow is studied numerically by solving the two dimensional momentum equations along with the continuity equation and the Carreau-Yasuda rheological model. We report systematic results in a range of generalized Reynolds number 250▫$leq$▫Re▫$leq$▫150 with a focus on its critical value. Results indicate that the shear-thinning viscous behaviour decreases the onset of bifurcation phenomena and the critical value of Reynolds number. Last but not least, a systematic grid refinement analysis and numerical accuracy study is performed and present numerical results may be treated as the benchmark.20082012-05-31 12:18:06Neznano26254UDK: 532.57:621.5COBISS_ID: 12570902ISSN pri članku: 1726-4529NUK URN: URN:SI:UM:DK:V5SEILRAsl