Effect of Interfacial Thermal Transport on Water Flow in Graphene Nanochannels

Diego Becerra*, Jens Honore Walther, Harvey A Zambrano

*Corresponding author for this work

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

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Abstract

Fluid flow in nanochannels is governed by interfacial phenomena thus thermal transport at solid-liquid interfaces can be a key parameter to design efficient nanodevices. Ultra-low friction to water flow and its exceptional mechanical and thermal properties make graphene a promising material to be used in nanofluidic systems. In a variety of applications, graphene has to be supported on a substrate. Here, we study the role of the underlying substrate on interfacial heat transport in graphene nanochannels. We conduct atomistic simulations of Poiseuille-like flow of water in a nanochannel with walls consisting of monolayer graphene supported on slabs of silica, polyamide and hexagonal boron nitride, respectively. The Joule heating dissipation through the walls is evaluated for different imposed flow rates. Temperature profiles, interfacial energy landscape and transport properties as interfacial viscosity, friction coefficient and water ordering are computed to gain insight into the effect of interfacial heat transport on nanoconfined flow. Density of states (DOS) across the graphene are measured to analyze the influence of the underlying substrates on the phonon thermal transport through the walls
Original languageEnglish
Publication date2021
Number of pages1
Publication statusPublished - 2021
EventAmerican Physical Society March Meeting 2021 - Online
Duration: 15 Mar 202119 Mar 2021

Conference

ConferenceAmerican Physical Society March Meeting 2021
LocationOnline
Period15/03/202119/03/2021

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