Inter-group mass transfer modeling in the two-group two-fluid model with interfacial area transport equation in condensing flow

Vineet Kumar, Caleb S. Brooks

Research output: Contribution to journalArticle

Abstract

The two-group two-fluid model with interfacial area transport equation is analyzed in gas-dispersed condensing flow. Past work on the inter-group mass transfer model, required for closure of the dispersed phase conservation equations and interfacial area transport equations, has only considered the condition of expansion of group-1 bubbles to group-2 bubbles with inter-group transfer from group-2 to group-1 only through group-2 breakup. However, in condensing flows, the condensation of large group-2 bubbles provide a significant source of mass and interfacial area to group-1 bubbles. Therefore, the inter-group mass transfer model is revisited in this work to derive a more general form suitable to any heat transfer and pressure change condition. The resulting model requires a second inter-group transfer coefficient. In analogy to the original model, a general case of the group distributions is considered to describe a preliminary treatment of the new inter-group transfer coefficients. The simulation employs a coupled calculation of the void transport equations and interfacial area transport equations for both bubble groups. Validation against existing data shows results consistent with the physics of the flow field.

Original languageEnglish (US)
Pages (from-to)688-703
Number of pages16
JournalInternational Journal of Heat and Mass Transfer
Volume119
DOIs
StatePublished - Apr 2018

Keywords

  • Annulus
  • Condensation
  • Interfacial area concentration
  • Validation
  • Void transport

ASJC Scopus subject areas

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

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