Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach

We formulate equations governing flows of suspensions of rod-like particles. Such suspensions include linear polymer solutions, FD-virus, and worm-like micelles. To take into account the particles that form and their rotation, we treat the suspension as a Cosserat continuum and apply the theory of m...

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Autor principal:	Vladimir Shelukhin
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	suspension rodlike particles rheology micropolar fluids anisotropy hysteresis Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/4a0108ad2c394c729218180d9fa712ad
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spelling	oai:doaj.org-article:4a0108ad2c394c729218180d9fa712ad2021-11-11T18:43:42ZFlows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach10.3390/polym132136792073-4360https://doaj.org/article/4a0108ad2c394c729218180d9fa712ad2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3679https://doaj.org/toc/2073-4360We formulate equations governing flows of suspensions of rod-like particles. Such suspensions include linear polymer solutions, FD-virus, and worm-like micelles. To take into account the particles that form and their rotation, we treat the suspension as a Cosserat continuum and apply the theory of micropolar fluids. Anisotropy of suspensions is determined through the inclusion of the microinertia tensor in the rheological constitutive equations. We check that the model is consistent with the basic principles of thermodynamics. In addition to anisotropy, the theory also captures gradient banding instability, coexistence of isotropic and nematic phases, sustained temporal oscillations of macroscopic viscosity, shear thinning and hysteresis. For the flow between two planes, we also establish that the total flow rate depends not only on the pressure gradient, but on the history of its variation as well.Vladimir ShelukhinMDPI AGarticlesuspensionrodlike particlesrheologymicropolar fluidsanisotropyhysteresisOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3679, p 3679 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	suspension rodlike particles rheology micropolar fluids anisotropy hysteresis Organic chemistry QD241-441
spellingShingle	suspension rodlike particles rheology micropolar fluids anisotropy hysteresis Organic chemistry QD241-441 Vladimir Shelukhin Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach
description	We formulate equations governing flows of suspensions of rod-like particles. Such suspensions include linear polymer solutions, FD-virus, and worm-like micelles. To take into account the particles that form and their rotation, we treat the suspension as a Cosserat continuum and apply the theory of micropolar fluids. Anisotropy of suspensions is determined through the inclusion of the microinertia tensor in the rheological constitutive equations. We check that the model is consistent with the basic principles of thermodynamics. In addition to anisotropy, the theory also captures gradient banding instability, coexistence of isotropic and nematic phases, sustained temporal oscillations of macroscopic viscosity, shear thinning and hysteresis. For the flow between two planes, we also establish that the total flow rate depends not only on the pressure gradient, but on the history of its variation as well.
format	article
author	Vladimir Shelukhin
author_facet	Vladimir Shelukhin
author_sort	Vladimir Shelukhin
title	Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach
title_short	Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach
title_full	Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach
title_fullStr	Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach
title_full_unstemmed	Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach
title_sort	flows of linear polymer solutions and other suspensions of rod-like particles: anisotropic micropolar-fluid theory approach
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4a0108ad2c394c729218180d9fa712ad
work_keys_str_mv	AT vladimirshelukhin flowsoflinearpolymersolutionsandothersuspensionsofrodlikeparticlesanisotropicmicropolarfluidtheoryapproach
_version_	1718431759370027008

Flows of Linear Polymer Solutions and Other Suspensions of Rod-like Particles: Anisotropic Micropolar-Fluid Theory Approach

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