Rotating spherical particle in a continuous viscoelastic medium —A microrheological example situation

Using analytical calculations, we characterize the rotational behavior of a rigid spherical particle when subject to a net external torque in a continuous viscoelastic environment. On long time scales, the embedding medium can either feature a net terminal flow, like a fluid, or damped reversible dy...

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Bibliographic Details
Published inEurophysics letters Vol. 134; no. 6; pp. 68002 - 68008
Main Authors Richter, S. K., Deters, C. D., Menzel, A. M.
Format Journal Article
LanguageEnglish
Published Les Ulis EDP Sciences, IOP Publishing and Società Italiana di Fisica 01.06.2021
IOP Publishing
Subjects
Elastic anisotropy
Elastic deformation
Fluid flow
Response functions
Rotating spheres
Torque
Viscoelasticity
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ISSN0295-5075
1286-4854
DOI10.1209/0295-5075/134/68002

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Summary:Using analytical calculations, we characterize the rotational behavior of a rigid spherical particle when subject to a net external torque in a continuous viscoelastic environment. On long time scales, the embedding medium can either feature a net terminal flow, like a fluid, or damped reversible dynamics, like an elastic solid. The coupling of the sphere to its environment together with the therein induced deformations and flows are taken into account explicitly. In reality, using magnetically anisotropic particles, the torque can, for instance, be applied via magnetic fields. We calculate the corresponding response functions. This connects our study to evaluations of microrheological investigations.
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ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/134/68002