Heat transfer characteristics and pressure variation in a nanoscale evaporating meniscus

Shalabh C. Maroo, J. N. Chung

Research output: Contribution to journalArticle

44 Scopus citations

Abstract

A nanoscale evaporating meniscus is simulated in this work using molecular dynamics. The heat and mass transfer characteristics and pressure variation in the non-evaporating and interline regions are studied. Very high heat and evaporation flux rates of the order of 100 MW/m2 and 1000 kg/m2 s, respectively, are achieved. The disjoining pressure increased significantly after the formation of the non-evaporating film. High negative liquid pressure induced due to capillary and disjoining pressures are obtained. Cavitation cannot occur as the film thickness is smaller than the critical cavitation radius, and the meniscus can exist in metastable state. A curve-fitted meniscus boundary condition is developed; a force function of the form Fn = An-3 - Cn-2 can be applied at the boundaries of a liquid film to create curvature and form a meniscus.

Original languageEnglish (US)
Pages (from-to)3335-3345
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Volume53
Issue number15-16
DOIs
StatePublished - Jul 1 2010
Externally publishedYes

Keywords

  • Capillary pressure
  • Disjoining pressure
  • Meniscus
  • Molecular dynamics
  • Nanoscale

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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