Non-equilibrium molecular dynamics method is applied to determine the slip length of fluid in the vicinity of the boundaries in Poiseuille flow in a nano-channel with and without nanoscale roughness, in which pressure is imposed to the fluid. Our simulations reveal the boundary roughness effect on the interfacial interaction between the fluid and boundary, which will result in the change of fluid velocity, and this phenomenon is more distinct with boundary roughness height. Bonding energy between solid boundary and fluid atoms is also calculated to make a comparison with that of pure fluid. Roughness changes with highness and its shape, so the key factors controlling fluid flow are presented. The simulation results show that there’s a relationship between the bonding energy at fluid–solid boundary interface and the fluid kinetic properties. In the case of rough surfaces, the bonding strength between liquid and solid atoms has a strong signature in the fluid velocity close to the boundary. In addition, temperature effect is also considered in our simulations, and we find that temperature also affect the hydrodynamic properties of fluid flowing in nano-channel significantly.
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ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer
December 11–14, 2013
Hong Kong, China
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-5615-4
PROCEEDINGS PAPER
Role of Nanoscale Roughness and Temperature on Poiseuille Flow at Liquid-Solid Interface Available to Purchase
Yan Wang,
Yan Wang
Nanjing University of Technology, Nanjing, China
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Xiang Ling
Xiang Ling
Nanjing University of Technology, Nanjing, China
Search for other works by this author on:
Yan Wang
Nanjing University of Technology, Nanjing, China
Xiang Ling
Nanjing University of Technology, Nanjing, China
Paper No:
MNHMT2013-22201, V001T03A010; 7 pages
Published Online:
February 26, 2014
Citation
Wang, Y, & Ling, X. "Role of Nanoscale Roughness and Temperature on Poiseuille Flow at Liquid-Solid Interface." Proceedings of the ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer. Hong Kong, China. December 11–14, 2013. V001T03A010. ASME. https://doi.org/10.1115/MNHMT2013-22201
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