Describing the hydrodynamics of nanoparticles in fluid media poses interesting challenges due to the coupling between the Brownian and hydrodynamic forces at the nanoscale. We focus on multiscale formulations of Brownian motion and hydrodynamic interactions (HI) of a single flexible polymeric nanoparticle in confining flows using the Brownian Dynamics method. The nanoparticle is modeled as a self-avoiding freely jointed polymer chain that is subject to Brownian forces, hydrodynamics forces, and repulsive interactions with the confining wall. To accommodate the effect of the wall, the hydrodynamic lift due to the wall is included in the mobility of a bead of the polymer chain which depends on its proximity to the wall. Using the example of a flexible polymeric nanoparticle, we illustrate temporal dynamics pertaining to the colloidal scale as well as the nanoscale.
Nanofluid Dynamics of Flexible Polymeric Nanoparticles Under Wall Confinement
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 8, 2018; final manuscript received February 22, 2019; published online March 27, 2019. Assoc. Editor: Debjyoti Banerjee.
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Farokhirad, S., Ramakrishnan, N., Eckmann, D. M., Ayyaswamy, P. S., and Radhakrishnan, R. (March 27, 2019). "Nanofluid Dynamics of Flexible Polymeric Nanoparticles Under Wall Confinement." ASME. J. Heat Transfer. May 2019; 141(5): 052401. https://doi.org/10.1115/1.4043014
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