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

Povzetek

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.

Ključne besede

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

Podatki

Jezik:	Angleški jezik
Leto izida:	2008
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	532.57:621.5
COBISS:	12570902
ISSN:	1726-4529
Št. ogledov:	1364
Št. prenosov:	108
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
URN:	URN:SI:UM:
Strani:	str. 187-198
Letnik:	ǂVol. ǂ7
Zvezek:	ǂno. ǂ4
Čas izdaje:	Dec. 2008
Ključne besede (UDK):	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