Initial configuration of argon atoms arranged in the center between two graphitic walls.
Example of a Gibbs dividing surface (dashed line) for the case of , , and . is at the center of the channel. The liquid phase occupies region of from . Below , it is the vapor phase.
Definition of the slip length in a planar Couette flow. The upper wall moves at , while the lower wall is fixed.
Intensity (gray scale) maps and density contours for contact angle simulations (from left to right: , 0.2, 0.3, and 0.4). and .
The density profile (left) and the gray scale map of density gradients (right) obtained from equilibrium molecular dynamics. (, , and ).
Contact angle vs relative energy (left) and cosine of the contact angle vs (right). ( and ).
Slip length vs data for the planar Couette flow at , for different values of temperature.
Contact angle vs relative size at and .
Slip length vs data for the planar Couette flow at different values of (for and .)
Slip length vs data for the planar Couette flow at , , and .
Fluid molecules form epitaxial layers in proximity to the wall, mimicking the solid lattice structure (, , and ).
Contact angle vs temperature data (at , , and ).
Slip length (nm) as a function of wall velocity (m/s) at and (for , 100, and ). Points: simulation data. Line: trend line fit.
Viscosity as a function of shear rate (wall speed) at different positions. There is scatter in the data. No shear thinning is observed at the wall.
Contact angle vs slip length due to changes in the relative energy (at fixed , , and ).
Contact angle vs slip length induced by changing (at fixed , , and ).
Overall summary of trends obtained in this study.
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