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The interpretation of a long-standing rheological flow problem using computational rheology and a PTT constitutive model
I.E. Garduño,
H.R. Tamaddon-Jahromi,
K. Walters,
M.F. Webster,
Michael Webster 
,
Hamid Tamaddon-Jahromi
,
Hamid Tamaddon-Jahromi
Journal of Non-Newtonian Fluid Mechanics
Swansea University Authors:
Michael Webster , Hamid Tamaddon-Jahromi
-
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DOI (Published version): 10.1016/j.jnnfm.2015.12.004
Abstract
Modern Computational Rheology techniques are used to interpret an experimental observation, which has remained unresolved for over four decades. The simple flow in question involved the rotation of a solid sphere in an infinite expanse of non-Newtonian elastic liquid. Under some conditions, Giesekus...
| Published in: | Journal of Non-Newtonian Fluid Mechanics |
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| Published: |
2015
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa26481 |
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| Abstract: |
Modern Computational Rheology techniques are used to interpret an experimental observation, which has remained unresolved for over four decades. The simple flow in question involved the rotation of a solid sphere in an infinite expanse of non-Newtonian elastic liquid. Under some conditions, Giesekus observed an interesting secondary flow. This added an ‘inertial’ secondary flow near the rotating sphere to the well-understood ‘slow-flow’ features observed and predicted by others in the 1960s. By employing a Phan-Thien/Tanner (PTT) constitutive model and moving away from the restriction of ‘slow-flow’, we show that it is possible to predict numerically the inertial vortex observed by Giesekus. |
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| Keywords: |
Rotating sphere, secondary flow field, Giesekus inertial vortex, hybrid finite element/finite volume scheme, PTT model |
| College: |
Faculty of Science and Engineering |