Title :
Friction law for water flowing in carbon nanotubes
Author :
Ma, Ming ; Shen, Luming ; Sheridan, John ; Liu, Zhe ; Chen, Chao ; Zheng, Quanshui
Author_Institution :
Dept. of Eng. Mech., Tsinghua Univ., Beijing, China
Abstract :
Previous molecular dynamics (MD) studies have suggested relationships that fail to predict the measurements of water flow through membranes of carbon nanotubes (CNTs). Through MD simulations of water transport over a flow rate range much wider than ever reported (0.002-1,400m/s) and use of flexible boundary condition, we discover a universal phenomenological logarithmic relationship between the CNT-water friction stress and flow rate, which is independent on tube chiralities, size and wetting properties. This logarithmic relationship is quantitatively in good agreement with the experimental observations. It thus provides a new basis for understanding the mechanisms of liquid slip at atomically smooth surfaces.
Keywords :
carbon nanotubes; chirality; friction; molecular dynamics method; water; wetting; C-H2O; CNT-water friction stress; carbon nanotubes; flowing water; friction law; liquid slip; molecular dynamics; smooth surfaces; tube chirality; wetting; Carbon nanotubes; Computational modeling; Electron tubes; Fluid flow measurement; Friction; Signal to noise ratio; Stress; carbon nanotubes; molecular dynamics simulation; water transportation;
Conference_Titel :
Nanoscience and Nanotechnology (ICONN), 2010 International Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4244-5261-3
Electronic_ISBN :
978-1-4244-5262-0
DOI :
10.1109/ICONN.2010.6045251