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The effect of particle inertia on triaxial ellipsoids in creeping shear: From drift toward chaos to a single periodic solution
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.
2011 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 23, no 1, 011704- p.Article in journal (Refereed) Published
Abstract [en]

The motion of inertial, triaxial ellipsoids in creeping shear flow is explained for a wide range of aspect ratios and Stokes numbers (St, quantifying particle inertia). Particle inertia induces a drift toward rotation around the shortest axis, with this axis aligned with the vorticity axis of the flow. For aspect ratio combinations in a certain region, this periodic state is unstable for low St and the particle moves in a chaotic manner. At higher St, the instability is stabilized and one single final periodic motion is well defined also for (in the limit of St=0) unstable aspect ratios.

Place, publisher, year, edition, pages
2011. Vol. 23, no 1, 011704- p.
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-31600DOI: 10.1063/1.3548864ISI: 000287424200005ScopusID: 2-s2.0-79551555013OAI: diva2:406309
Swedish Research Council
QC 20110325Available from: 2011-03-25 Created: 2011-03-21 Last updated: 2011-03-25Bibliographically approved

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Lundell, Fredrik
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Linné Flow Center, FLOWMechanics
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