NDLI: “Law of the nano-wall” in nano-channel gas flows

Content Provider	Springer Nature Link
Author	Barisik, Murat Beskok, Ali
Copyright Year	2016
Abstract	Molecular dynamics simulations of force-driven nano-channel gas flows show two distinct flow regions. While the bulk flow region can be determined using kinetic theory, transport in the near-wall region is dominated by gas–wall interactions. This duality enables definition of an inner-layer scaling, $$y^{}$$ , based on the molecular dimensions. For gas–wall interactions determined by Lennard–Jones potential, the velocity distribution for $$y^{} \le 3$$ exhibits a universal behavior as a function of the local Knudsen number and gas–wall interaction parameters, which can be interpreted as the “law of the nano-wall.” Knowing the velocity and density distributions within this region and using the bulk flow velocity profiles from Beskok–Karniadakis model (Beskok and Karniadakis in Microscale Thermophys Eng 3(1):43–77, 1999), we outline a procedure that can correct kinetic-theory-based mass flow rate predictions in the literature for various nano-channel gas flows.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	20
Issue Number	3
e-ISSN	16134990
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-02-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wall force field effects Scale effects Nano-flows Mass flow rate Smart wall molecular dynamics Engineering Fluid Dynamics Biomedical Engineering Analytical Chemistry Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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