A kinetic theory description of liquid menisci at the microscale

Paolo Barbante, Aldo Frezzotti, Livio Gibelli

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A kinetic model for the study of capillary flows in devices with microscale geometry is presented. The model is based on the Enskog-Vlasov kinetic equation and provides a reasonable description of both fluid-fluid and fluid-wall interactions. Numerical solutions are obtained by an extension of the classical Direct Simulation Monte Carlo (DSMC) to dense fluids. The equilibrium properties of liquid menisci between two hydrophilic walls are investigated and the validity of the Laplace-Kelvin equation at the microscale is assessed. The dynamical process which leads to the meniscus breakage is clarified.

Original languageEnglish
Pages (from-to)235-254
Number of pages20
JournalKinetic and Related Models
Volume8
Issue number2
Early online date1 Mar 2015
DOIs
Publication statusPublished - 1 Jun 2015

Keywords / Materials (for Non-textual outputs)

  • Enskog-Vlasov equation
  • Liquid meniscus
  • Microchannels
  • Surface tension
  • Two-phase flow

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