Shear Viscosity of Inhomogeneous Hard-Sphere Fluids

Abstract:

Using molecular dynamics on Hard-Sphere-like fluids subject to an external sinusoidal field inducing density inhomogeneities and undergoing a bi-periodical shear flow, we have studied the local viscosity of the inhomogeneous fluid. It has been shown that for a slowly varying density profile the local average density model combined with the well-known models proposed in the density function theory yields a good description of the viscosity profile obtained by molecular simulation. However, for a rapidly varying density profile these models are unable to describe correctly the viscosity profile obtained by molecular simulations. So, to overcome the weakness of these models we have proposed a simple model that takes into account the effect of the angle formed by the colliding molecules and the direction of the flow.

• Periodical: Applied Mechanics and Materials (Volume 330)
• Pages: 27-31
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.330.27
• Online since: June 2013
• Authors: Hai Hoang, Guillaume Galliero
• Keywords: Density Functionnal Theory, Hard-Sphere Fluid, Inhomogeneous Fluids, Local Shear Viscosity, Non-Equilibrium Molecular Dynamics Simulation

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