Journal article

Friction of water slipping in carbon nanotubes

Ming D Ma, Luming Shen, John Sheridan, Jefferson Zhe Liu, Chao Chen, Quanshui Zheng

Physical Review E | AMER PHYSICAL SOC | Published : 2011

Abstract

Liquid slip is essential in nanofluidic systems, as shrinking channel size leads to a dramatic increase in flow resistance and thus high-energy consumption for driving nonslip flow. Using large-scale nonequilibrium molecular dynamics simulation of water flowing in carbon nanotubes (CNT's), we show that the relationship between the CNT wall-water interfacial friction stress and slip velocity follows a transition-state-theory-based inverse hyperbolic sine function, which remains universally valid regardless of wetting properties, CNT chiralities, and CNT sizes, and holds for all slip velocities from 0 to 1400 m/s. The finding could benefit the research in desalination and other chemical purifi..

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University of Melbourne Researchers

Grants

Awarded by National Science Foundation of China (NSFC)


Awarded by 973 Program


Funding Acknowledgements

This work is supported by the National Science Foundation of China (NSFC) through Grants No. 10672089, No. 10772100, No. 10832005, the 973 Program Grant No. 2007CB936803, and the IBM World Community Grid project "Computing for Clean Water." Some of the MD simulations were carried out on the supercomputers in the Victorian Partnership for Advanced Computing (VPAC) and the NCI National Facilities in Australia.