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Anomalous Flow Behavior in Nanochannels: A Molecular Dynamics Study

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posted on 09.01.2011 by Sohail Murad, Lin Luo, Liang-Yin Chu
We report molecular dynamics simulations of flow of water in nanochannels with a range of surface wettability characteristics (hydrophobic to strongly hydrophilic) and driving forces (pressures). Our results show apparently anomalous behavior. At low pressures, the rate is higher in nanochannels with hydrophilic surfaces than that with hydrophobic surfaces; however, with high pressure driven flow we observe opposite trends. This apparently anomalous behavior can be explained on the basis of molecular thermodynamics and fluid mechanics considerations. Understanding such behavior is important in many nanofluidic devices such as nanoreactors, nanosensors, and nanochips that are increasingly being designed and used.

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Postprint version of article may differ from published version. The definitive version is available through Elsevier at DOI: 10.1016/j.cplett.2010.04.070

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Elsevier

Language

en_US

issn

0009-2614

Issue date

07/06/2010

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