Dynamic simulation of non-spherical particulate suspensions

Kittipoomwong, Prakorn and See, Howard and Mai-Duy, Nam (2010) Dynamic simulation of non-spherical particulate suspensions. Rheologica Acta, 49 (6). pp. 597-606. ISSN 0035-4511

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Abstract

Particle-level simulation has been employed to investigate rheology and microstructure of nonspherical particulate suspensions in a simple shear flow. Non-spherical particles in Newtonian fluids are modeled as three-dimensional clusters of neutrally buoyant, non-Brownian spheres linked together by Hookeantype constraint force. Rotne–Prager correction to velocity disturbance has been employed to account for far-field hydrodynamic interactions. An isolated rodlike particle in simple shear flow exhibits a periodic orientation distribution, commonly referred to as Jeffery orbit. Lubrication-like repulsive potential between clusters have been included in simulation of rod-like suspensions at various aspect ratios over dilute to semidilute volume fractions. Shear viscosity evaluated by orientation distribution qualitatively agrees with one obtained by direct computation of shear stress.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version deposited in accordance with the copyright policy of the publisher.
Depositing User: Dr Nam Mai-Duy
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 13 Mar 2011 12:11
Last Modified: 03 Jul 2013 00:28
Uncontrolled Keywords: particle-level simulation; fiber; suspension rheology
Fields of Research (FOR2008): 09 Engineering > 0904 Chemical Engineering > 090408 Rheology
09 Engineering > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1007/s00397-009-0412-6
URI: http://eprints.usq.edu.au/id/eprint/18251

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