Apparent yield stress in rigid fibre suspensions: the role of attractive colloidal interactions / Bounoua S.,Lemaire E.,Ferec J.,Ausias G.,Zubarev A.,Kuzhir P. // JOURNAL OF FLUID MECHANICS. - 2016. - V. 802, l. . - P. 611-633.

ISSN/EISSN:

0022-1120 / 1469-7645

Type:

Article

Abstract:

This work is focused on the modelling of the shear and normal stresses in fibre suspensions that are subjected to a simple shear flow in the presence of short-range lubrication forces, van der Waals and electrostatic forces, as well as solid friction forces between fibres. All of these forces are weighed by the contact probability. The theory is developed for attractive fibres with van der Waals interaction dominating over electrostatic repulsion. The model predicts a simple Bingham law for both the shear stress and the first normal stress difference, with the apparent shear and normal yield stresses proportional to the second and the third power of the particle volume fraction respectively. The model is applied to the experimental data of Rakatekar et al. (Adv. Mater., vol. 21, 2009, pp. 874-878) and Natale et al. (AIChE J., vol. 60, 2014, pp. 1476-1487) on suspensions of carbon nanotubes dispersed in a Newtonian epoxy resin. It reproduces well the quadratic dependence of the apparent yield stress on the particle volume fraction (sigma(y) proportional to phi(2)) for average particle aspect ratios of r= 160 and 1200, while it underpredicts the power-law exponent for r= 80 (always predicting phi(2) behaviour instead of phi(3.2)).

Author keywords:

colloids; rheology; suspensions CARBON NANOTUBE SUSPENSIONS; CONCENTRATED SUSPENSIONS; AQUEOUS DISPERSIONS; STATISTICAL-THEORY; SHEAR-FLOW; RHEOLOGY; PARTICLES; EPOXY; MICROSTRUCTURE; FLOCCULATION

DOI:

10.1017/jfm.2016.475

Web of Science ID:

ISI:000381020500028

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	SEP
Publisher	CAMBRIDGE UNIV PRESS
Address	32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
Language	English
EISSN	1469-7645
Keywords-Plus	CARBON NANOTUBE SUSPENSIONS; CONCENTRATED SUSPENSIONS; AQUEOUS DISPERSIONS; STATISTICAL-THEORY; SHEAR-FLOW; RHEOLOGY; PARTICLES; EPOXY; MICROSTRUCTURE; FLOCCULATION
Research-Areas	Mechanics; Physics
Web-of-Science-Categories	Mechanics; Physics, Fluids \& Plasmas
Author-Email	kuzhir@unice.fr
ResearcherID-Numbers	Ferec, Julien/G-2898-2015
ORCID-Numbers	Ferec, Julien/0000-0002-3140-3094 Kuzhir, Pavel/0000-0001-7089-6197 Ausias, Gilles/0000-0001-5409-2316
Funding-Acknowledgement	Program of the Ministry of Education of the Russian Federation {[}3.12.2014/K]
Funding-Text	The authors are grateful to Professors P. J. Carreau and M. C. Heuzey of Polytechnique Montreal and Dr G. Natale from the University of Calgary for providing the experimental data. They would also like to acknowledge Region Provence - Alpes Cote d'Azur which funded one of them. This work was also supported by the Program of the Ministry of Education of the Russian Federation (project no. 3.12.2014/K).
Number-of-Cited-References	50
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	12
Journal-ISO	J. Fluid Mech.
Doc-Delivery-Number	DS8GC