The multicomponent diffuse-interface model and its application to water/air interfaces

Research output: Contribution to journalArticlepeer-review

Abstract

Fundamental properties of the multicomponent diffuse-interface model (DIM), such as the maximum entropy principle and conservation laws, are used to explore the basic interfacial dynamics and phase transitions in fluids. Flat interfaces with monotonically changing densities of the components are proved to be stable. A liquid layer in contact with oversaturated but stable vapour is shown to either fully evaporate or eternally expand (depending on the initial perturbation), whereas a liquid in contact with saturated vapour always evaporates. If vapour is bounded by a solid wall with a sufficiently large contact angle, spontaneous condensation occurs in the vapour. The external parameters of the multicomponent DIM-e.g.The Korteweg matrix describing the long-range intermolecular forces-are determined for the water/air combination. The Soret and Dufour effects are shown to be negligible in this case, and the interfacial flow, close to isothermal.

Original languageEnglish
Article numberA41
JournalJournal of Fluid Mechanics
Volume954
DOIs
Publication statusPublished - 10 Jan 2023

Keywords

  • condensation/evaporation
  • multiphase flow

Fingerprint

Dive into the research topics of 'The multicomponent diffuse-interface model and its application to water/air interfaces'. Together they form a unique fingerprint.

Cite this