A New Slip Boundary Model of Liquid Flows

Abstract:

With the development of Micro Electro Mechanism System, the linear slip boundary of liquid flow has been often used. In this paper, some flows in different wettability boundaries were researched by Non-Equilibrium Molecular Dynamics (NEMD) simulation, and the characteristics of the slip length were discussed. The results show that: when liquid flow on the hydrophobic boundary, the slip length decreases with the external force increasing and the shear rate increasing near boundaries, the width of channel and the external force are not independent variables of the slip length, and the shear rate and the surface wettability are independent variables of the slip length. The slip length can be reduced by increasing the driving force for liquid flow in a channel. Finally, a new power law model of the slip boundary of liquid flow was derived.

• Periodical: Advanced Materials Research (Volume 629)
• Pages: 611-616
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.629.611
• Online since: December 2012
• Authors: Fu Quan Song, Xiao Xing Chen
• Keywords: Molecular Dynamic (MD), Slip Boundary Model, Slip Length, Wettability

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