Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study

Complex colloidal fluids, depending on constituent shapes and packing fractions, may have a wide range of shear-thinning and/or shear-thickening behaviors. An interesting way to transition between different types of such behavior is by infusing complex functional particles that can be manufactured u...

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Autores principales:	Rofiques Salehin, Rong-Guang Xu, Stefanos Papanikolaou
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	molecular dynamics functional particles jamming shear thickening viscosity diffusivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/3b349fa1480d429e9d45bc6c9f9606e6
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spelling	oai:doaj.org-article:3b349fa1480d429e9d45bc6c9f9606e62021-11-25T18:14:15ZColloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study10.3390/ma142268671996-1944https://doaj.org/article/3b349fa1480d429e9d45bc6c9f9606e62021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6867https://doaj.org/toc/1996-1944Complex colloidal fluids, depending on constituent shapes and packing fractions, may have a wide range of shear-thinning and/or shear-thickening behaviors. An interesting way to transition between different types of such behavior is by infusing complex functional particles that can be manufactured using modern techniques such as 3D printing. In this paper, we perform 2D molecular dynamics simulations of such fluids with infused star-shaped functional particles, with a variable leg length and number of legs, as they are infused in a non-interacting fluid. We vary the packing fraction (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ϕ</mi></semantics></math></inline-formula>) of the system, and for each different system, we apply shear at various strain rates, turning the fluid into a shear-thickened fluid and then, in jammed state, rising the apparent viscosity of the fluid and incipient stresses. We demonstrate the dependence of viscosity on the functional particles’ packing fraction and we show the role of shape and design dependence of the functional particles towards the transition to a shear-thickening fluid.Rofiques SalehinRong-Guang XuStefanos PapanikolaouMDPI AGarticlemolecular dynamicsfunctional particlesjammingshear thickeningviscositydiffusivityTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6867, p 6867 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	molecular dynamics functional particles jamming shear thickening viscosity diffusivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	molecular dynamics functional particles jamming shear thickening viscosity diffusivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Rofiques Salehin Rong-Guang Xu Stefanos Papanikolaou Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
description	Complex colloidal fluids, depending on constituent shapes and packing fractions, may have a wide range of shear-thinning and/or shear-thickening behaviors. An interesting way to transition between different types of such behavior is by infusing complex functional particles that can be manufactured using modern techniques such as 3D printing. In this paper, we perform 2D molecular dynamics simulations of such fluids with infused star-shaped functional particles, with a variable leg length and number of legs, as they are infused in a non-interacting fluid. We vary the packing fraction (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ϕ</mi></semantics></math></inline-formula>) of the system, and for each different system, we apply shear at various strain rates, turning the fluid into a shear-thickened fluid and then, in jammed state, rising the apparent viscosity of the fluid and incipient stresses. We demonstrate the dependence of viscosity on the functional particles’ packing fraction and we show the role of shape and design dependence of the functional particles towards the transition to a shear-thickening fluid.
format	article
author	Rofiques Salehin Rong-Guang Xu Stefanos Papanikolaou
author_facet	Rofiques Salehin Rong-Guang Xu Stefanos Papanikolaou
author_sort	Rofiques Salehin
title	Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
title_short	Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
title_full	Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
title_fullStr	Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
title_full_unstemmed	Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
title_sort	colloidal shear-thickening fluids using variable functional star-shaped particles: a molecular dynamics study
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3b349fa1480d429e9d45bc6c9f9606e6
work_keys_str_mv	AT rofiquessalehin colloidalshearthickeningfluidsusingvariablefunctionalstarshapedparticlesamoleculardynamicsstudy AT rongguangxu colloidalshearthickeningfluidsusingvariablefunctionalstarshapedparticlesamoleculardynamicsstudy AT stefanospapanikolaou colloidalshearthickeningfluidsusingvariablefunctionalstarshapedparticlesamoleculardynamicsstudy
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Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study

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