Origin of Surface-Driven Passive Liquid Flows

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Passive liquid flow occurs in nature in the transport of water up tall trees and is desired for high-heat flux removal in thermal management devices. Typically, liquid-vapor surface tension is used to generate passive flows (e.g., capillary and Marangoni flows). In this work, we perform a fundamental molecular study on passive liquid flow driven by the solid-liquid surface tension force. Such surface tension values are first estimated by placing a liquid film over the surface and simulating various surface temperatures, followed by which simulations are performed by differential heating of the liquid film over the surface. Very strong passive liquid flows are obtained that lead to steady-state, continuous, and high-heat flux removal close to the maximum theoretical limit, as predicted by the kinetic theory of evaporation. Nondimensional empirical relations are developed for surface tension gradient, flow velocity, and evaporation rate.

Original languageEnglish (US)
Pages (from-to)8593-8597
Number of pages5
JournalLangmuir
Volume32
Issue number34
DOIs
StatePublished - Aug 30 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Fingerprint Dive into the research topics of 'Origin of Surface-Driven Passive Liquid Flows'. Together they form a unique fingerprint.

  • Cite this