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DKUM
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Title:
Symmetry breaking phenomena of purely viscous shear-thinning fluid flow in a locally constricted channel
Authors:
ID
Ternik, Primož
(
Author
)
Files:
http://dx.doi.org/10.2507/IJSIMM07(4)3.107
Language:
English
Work type:
Unknown
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
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
Year of publishing:
2008
PID:
20.500.12556/DKUM-26254
UDC:
532.57:621.5
ISSN on article:
1726-4529
COBISS.SI-ID:
12570902
NUK URN:
URN:SI:UM:DK:V5SEILRA
Publication date in DKUM:
31.05.2012
Views:
2221
Downloads:
146
Metadata:
Categories:
Misc.
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Record is a part of a journal
Title:
International journal of simulation modelling
Shortened title:
Int. j. simul. model.
Publisher:
DAAAM International Vienna
ISSN:
1726-4529
COBISS.SI-ID:
8008982
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