The Effect of Weak Confinement on the Orientation of Nanorods under Shear Flows

Nanomaterials
Saman MonjeziJoontaek Park

Abstract

We performed a numerical analysis to study the orientation distribution of a dilute suspension of thin, rigid, rod-like nanoparticles under shearing flow near a solid boundary of weak confinement. Brownian dynamics simulation of a rod was performed under various ratios of shear rate and rod diffusivity (Peclet number), as well as the center-of-mass position (wall confinement). We discuss the effects of Peclet number and wall confinement on the angle distributions, Jeffery orbit distribution and average orientation moments. The average orientation moments, obtained as a function of Peclet number and wall confinement, can be used to improve a previous shear-induced migration model. We demonstrate that the improved model can give excellent prediction of the orientation moment distributions in a microchannel flow.

References

Nov 13, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Joontaek ParkJason E Butler
Nov 16, 2012·Analytical and Bioanalytical Chemistry·Julien GigaultVincent A Hackley

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Citations

Jul 16, 2019·Soft Matter·Andreas ZöttlDirk G A L Aarts
Nov 9, 2018·Biomicrofluidics·Behrouz BehdaniJoontaek Park
Dec 18, 2020·Physical Review. E·Maria Christine L LugoMark Nolan P Confesor

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