Molecular transport in nanopores

Bhatia, Suresh K. ; Nicholson, David (2003) Molecular transport in nanopores Journal of Chemical Physics, 119 (3). pp. 1719-1730. ISSN 1674-0068

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Simulation of the transport of methane in cylindrical silica mesopores have been performed using equilibrium and nonequilibrium molecular dynamics (NEMD) as well as dual control volume grand canonical molecular dynamics methods. It is demonstrated that all three techniques yield the same transport coefficient even in the presence of viscous flow. A modified locally averaged density model for viscous flow, combined with consideration of wall slip through a frictional condition, gives a convincing interpretation of the variation of the transport coefficient over a wide range of densities, and for various pore sizes and temperatures. Wall friction coefficients extracted from NEMD simulations are found to be consistent with momentum transfer arguments, and the approach is shown to be more meaningful than the classical slip length concept.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:2982
Deposited On:09 Oct 2010 10:25
Last Modified:17 May 2011 06:28

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