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.
S. Monjezi et al., "The Effect of Weak Confinement on the Orientation of Nanorods under Shear Flows," Nanomaterials, vol. 8, no. 3, MDPI, Mar 2018.
The definitive version is available at https://doi.org/10.3390/nano8030130
Chemical and Biochemical Engineering
Keywords and Phrases
Microchannel Flow; Nanorod; Orientation Distribution; Orientation Moments; Rod-Like Particle
International Standard Serial Number (ISSN)
Article - Journal
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01 Mar 2018