Mathematical modeling and simulation for Marangoni convection by surfactants in liquid falling film

Chan Ho Lee, Jong Joo Ha, Byung Hee Chun, Hyung Kee Yoon, Sung Hyun Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In an absorption refrigeration system, it is well known that water vapor absorption into lithium bromide (LiBr) aqueous solution is enhanced by the addition of surfactants. Marangoni convection plays a role but its mechanism has not clearly been understood yet. In the present study, a relation between heat and mass transfer and Marangoni convection was investigated using mathematical modeling and numerical simulation in a falling film type absorber. We used an advanced Marangoni convection model that is able to predict velocity, temperature and mass fraction distribution in a falling film type absorber. Firstly, the effect of Marangoni convection on heat and mass transfer in an absorber was examined. As a result, efficiency of heat and mass transfer was increased due to Marangoni convection. Secondly, analysis for the effects of different operating conditions on an onset of Marangoni convection was carried out. The Marangoni number for the onset of convection decreased as the initial temperature and initial water mass fraction of solution decreased.

Original languageEnglish
Pages (from-to)259-264
Number of pages6
JournalJournal of Chemical Engineering of Japan
Volume36
Issue number3
DOIs
Publication statusPublished - 2003 Mar

Keywords

  • Absorption heat pump
  • Heat transfer
  • Marangoni effect
  • Mass transfer
  • Surfactants

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Mathematical modeling and simulation for Marangoni convection by surfactants in liquid falling film'. Together they form a unique fingerprint.

Cite this