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Structure and Dynamics of Confined Fluids
Abstract We describe molecular dynamics simulations which probe the structural and dynamical properties of fluid films confined between two solid walls. Solid walls induce normal and in-plane order in the adjacent fluid. In-plane order plays a fundamental role in the transmission of shear stress and is directly correlated with the boundary condition for fluid flow. When the wall separation is only a few molecular diameters, crystalline or glassy order is induced across the entire film. The onset of the glassy phase is characterized by a power-law distribution of relaxation times with an apparently universal exponent. Under shear, glassy or crystalline films exhibit stick-slip dynamics. Analysis reveals that this stick-slip motion involves periodic shear-melting and resolidification of the film.
Structure and Dynamics of Confined Fluids
Abstract We describe molecular dynamics simulations which probe the structural and dynamical properties of fluid films confined between two solid walls. Solid walls induce normal and in-plane order in the adjacent fluid. In-plane order plays a fundamental role in the transmission of shear stress and is directly correlated with the boundary condition for fluid flow. When the wall separation is only a few molecular diameters, crystalline or glassy order is induced across the entire film. The onset of the glassy phase is characterized by a power-law distribution of relaxation times with an apparently universal exponent. Under shear, glassy or crystalline films exhibit stick-slip dynamics. Analysis reveals that this stick-slip motion involves periodic shear-melting and resolidification of the film.
Structure and Dynamics of Confined Fluids
Thompson, Peter A. (author) / Robbins, Mark O. (author) / Grest, Gary S. (author)
1993-01-01
12 pages
Article/Chapter (Book)
Electronic Resource
English
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