The chaotic rotation of elongated particles in anoscillating Couette ow

Flows with suspended particles occur in a large range of engineering applicationsand biological systems. A fundamental understanding of the uidparticlecoupling can be obtained by analyzing single particles in simple ow situations. Nilsen and Anderson (2013) studied the dynamics of a prolatespheroid...

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Main Author: Berg, Niclas
Format: Others
Language:English
Published: KTH, Mekanik 2013
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202629
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spelling ndltd-UPSALLA1-oai-DiVA.org-kth-2026292017-03-03T05:23:16ZThe chaotic rotation of elongated particles in anoscillating Couette owengBerg, NiclasKTH, Mekanik2013Flows with suspended particles occur in a large range of engineering applicationsand biological systems. A fundamental understanding of the uidparticlecoupling can be obtained by analyzing single particles in simple ow situations. Nilsen and Anderson (2013) studied the dynamics of a prolatespheroid rotating in the ow-gradient plane of an oscillating creepingshear ow. They found that given a high enough particle inertia the rotationcould become chaotic. This thesis extends on this work by taking uid inertia into account and studying the rotation of an elliptical cylinder.Numerical simulations with the Lattice Boltzmann EBF method reveal alarge variety of rotational states. Further, chaotic solutions are identiedwith a new Lyapunov exponent based algorithm. These chaotic solutionsare found to be present for heavy particles (compared to the uid) and smalloscillation frequencies (compared to the shear rate in the channel). Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202629application/pdfinfo:eu-repo/semantics/openAccess
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language English
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sources NDLTD
description Flows with suspended particles occur in a large range of engineering applicationsand biological systems. A fundamental understanding of the uidparticlecoupling can be obtained by analyzing single particles in simple ow situations. Nilsen and Anderson (2013) studied the dynamics of a prolatespheroid rotating in the ow-gradient plane of an oscillating creepingshear ow. They found that given a high enough particle inertia the rotationcould become chaotic. This thesis extends on this work by taking uid inertia into account and studying the rotation of an elliptical cylinder.Numerical simulations with the Lattice Boltzmann EBF method reveal alarge variety of rotational states. Further, chaotic solutions are identiedwith a new Lyapunov exponent based algorithm. These chaotic solutionsare found to be present for heavy particles (compared to the uid) and smalloscillation frequencies (compared to the shear rate in the channel).
author Berg, Niclas
spellingShingle Berg, Niclas
The chaotic rotation of elongated particles in anoscillating Couette ow
author_facet Berg, Niclas
author_sort Berg, Niclas
title The chaotic rotation of elongated particles in anoscillating Couette ow
title_short The chaotic rotation of elongated particles in anoscillating Couette ow
title_full The chaotic rotation of elongated particles in anoscillating Couette ow
title_fullStr The chaotic rotation of elongated particles in anoscillating Couette ow
title_full_unstemmed The chaotic rotation of elongated particles in anoscillating Couette ow
title_sort chaotic rotation of elongated particles in anoscillating couette ow
publisher KTH, Mekanik
publishDate 2013
url http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202629
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