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Molecular dynamics simulations of nanoscale Poiseuille flow
Hu Haibao *,Bao Luyao #
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072
*Correspondence author
#Submitted by
Subject:
Funding: Key National Natural Science Foundation of China （No.Grant Nos. 51335010), National Natural Science Foundation of China）
Opened online: 4 November 2014
Accepted by: none
Citation: Hu Haibao,Bao Luyao.Molecular dynamics simulations of nanoscale Poiseuille flow[OL]. [ 4 November 2014] http://en.paper.edu.cn/en_releasepaper/content/4613937
 
 
The studies about microcosmic flow behavior on hydrophobic surfaces are important for exploring the drag reduction mechanism in detail. To elucidate the slip behavior of nanoscale Poiseuille flow with different wettability boundary, we have investigated parametrically the effects of wall-fluid interaction and driving force on the slippage, using the nonequilibrium molecular dynamics simulation method. The results obtained show that the average velocity and slip length firstly increase and then decrease with the increase of wall fluid interaction, which are quite strange to the common notion. And an underlying molecular-kinetic mechanism about this phenomenon is implied. Meanwhile the results of various driving forces also reveal that driving force affects density distributions slightly, but velocity distributions and slip lengths significantly in the hydrophobic nanochannel.
Keywords:fluid dynamics;slip length;Poiseuille flow;wall-fluid interactions;driving force;molecular dynamics simulation
 
 
 

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