Symmetry breaking phenomena of purely viscous shear-thinning fluid flow in a locally constricted channel

Abstract

The 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.

Keywords

bifurcation;inelastic shear-thinning fluid;Carreau-Yasuda model;numerical modelling;

Data

Language:	English
Year of publishing:	2008
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
UDC:	532.57:621.5
COBISS:	12570902
ISSN:	1726-4529
Views:	1364
Downloads:	108
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
URN:	URN:SI:UM:
Pages:	str. 187-198
Volume:	ǂVol. ǂ7
Issue:	ǂno. ǂ4
Chronology:	Dec. 2008
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;physics;fizika;fluid mechanics in general;mechanics of liquids (hydromechanics);mehanika tekočin;mehanika kapljevin;liquid motion;hydrodynamics;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;mechanical engineering in general;nuclear technology;electrical engineering;machinery;strojništvo;pneumatic energy;machinery and tools;refrigeration;pnevmatska energija;stroji in orodja;ohlajevanje;
DOI:	10.2507/IJSIMM07(4)3.107
ID:	13939