Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6119
Title: Law of the nano-wall” in nano-channel gas flows
Authors: Barışık, Murat
Beşkök, Ali
Barışık, Murat
Izmir Institute of Technology. Mechanical Engineering
Keywords: Mass flow rate
Scale effects
Wall force field effects
Flow of gases
Nano-flows
Issue Date: 1-Mar-2016
Publisher: Springer Verlag
Source: Barışık, M., and Beşkök, A. (2016). Law of the nano-wall” in nano-channel gas flows. Microfluidics and Nanofluidics, 20(3), 1-9. doi:10.1007/s10404-016-1713-6
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, (Formula presented.) , based on the molecular dimensions. For gas–wall interactions determined by Lennard–Jones potential, the velocity distribution for (Formula presented.) 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.
URI: http://doi.org/10.1007/s10404-016-1713-6
http://hdl.handle.net/11147/6119
ISSN: 1613-4982
16134990
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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