Motion of a nano-spheroid in a cylindrical vessel flow: Brownian and hydrodynamic interactions.

ABSTRACT: We study the motion of a buoyant or a nearly neutrally buoyant nano-sized spheroid in a fluid filled tube without or with an imposed pressure gradient (weak Poiseuille flow). The fluctuating hydrodynamics approach and the deterministic method are both employed. We ensure that the fluctuation-dissipation relation and the principle of thermal equipartition of energy are both satisfied. The major focus is on the effect of the confining boundary. Results for the velocity and the angular velocity autocorrelations (VACF and AVACF), the diffusivities and the drag and the lift forces as functions of the shape, the aspect ratio, the inclination angle and the proximity to the wall are presented. For the parameters considered, the boundary modifies the VACF and AVACF such that three distinct regimes

SUBMITTER: Ramakrishnan N 

PROVIDER: S-EPMC5669124 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature