Carbon nanotube-based coatings to induce flow enhancement in hydrophilic nanopores

Enrique Wagemann, Jens Honore Walther, Harvey Zambrano

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Abstract

With the emergence of the field of nanofluidics, the transport of water in hydrophilic nanopores has attracted intensive research due to its many promising applications. Experiments and simulations have found that flow resistance in hydrophilic nanochannels is much higher than those in macrochannels. Indeed, this might be attributed to significant fluid adsorption on the channel walls and to the effect of the increased surface to volume ratio inherent to the nanoconfinement. Therefore, it is desirable to explore strategies for drag reduction in nanopores.Recently, studies have found that carbon nanotubes (CNTs) feature ultrafast waterflow rates which result in flow enhancements of 1 to 5 orders of magnitude compared to Hagen-Poiseuille predictions. In the present study, CNT-based coatings are considered to induce water flow enhancement in silica nanopores with different radius. We conduct atomistic simulations of pressurized water flow inside tubularsilica nanopores with and without inner coaxial carbon nanotubes. In particular, we compute water density and velocity profiles, flow enhancement and slip lengthsto understand the drag reduction capabilities of single- and multi-walled carbon nanotubes implemented as coating material in silica nanopores.
Original languageEnglish
Title of host publicationBulletin of the American Physical Society
Number of pages1
Volume61
PublisherAmerican Physical Society
Publication date2016
Article numberA22.00008
Publication statusPublished - 2016
Event69th Annual Meeting of the APS Division of Fluid Dynamics - Portland, United States
Duration: 20 Nov 201622 Nov 2016

Conference

Conference69th Annual Meeting of the APS Division of Fluid Dynamics
Country/TerritoryUnited States
CityPortland
Period20/11/201622/11/2016

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