Volume 125, Number 1, January 2019
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||21 January 2019|
A remarkable enhancement of water molecules permeation across a combined carbon nanotube
School of Physical Science and Technology, China University of Mining and Technology - Xuzhou 221116, China
Received: 11 August 2018
Accepted: 14 December 2018
Transfer of single-file water molecules across a carbon nanotube in a nanoscale is critical in many applications. However, the transfer rate is very slow in a carbon nanotube with a small radius. In this article, a method is proposed to enhance the transfer rate of water molecules across a carbon nanotube with a small entrance radius. By molecular-dynamics simulations, the effect of a combined carbon nanotube on water permeation is studied. The maximal enhancement ratio can reach a value up to 20.52 when changing the type of a combined carbon nanotube. At the same time, the enhancement of water transfer across a combined carbon nanotube shows a monotonously increasing behavior. The LJ potential between a water molecule and a combined carbon nanotube is adopted to analyze the physical mechanism. These results are useful for designing high-flow water transfer rate devices and providing new insights into a combined carbon nanotube.
PACS: 47.56.+r – Flows through porous media / 47.85.L- – Flow control / 07.05.Tp – Computer modeling and simulation
© EPLA, 2019
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