Measure of bubble non-uniformity within circular region in a direct-contact heat exchanger

Research output: Contribution to journalArticle

  • Authors:
  • Qingtai Xiao
  • Jianxin Pan
  • Zhihan Lv
  • Jianxin Xu
  • Hua Wang

Abstract

The study of bubble swarm distributions in a direct-contact heat exchanger was addressed both theoretically and experimentally. But recently developed approach based on uniform design for measuring bubbles uniformity and mixing efficiency within rectangular or square region cannot be used to characterize the mixture homogeneity and mixing time within circular region. This paper discussed the difference between rectangular or square region and circular region. A quantitative metric of mixing uniformity is used to characterize the bubble patterns within circular region. Simulation studies are also used to illustrate the proposed methodologies while the experimental case considered demonstrate that the proposed approach evaluated the experimental data rather well. The space-time features of the mixing transient have been successfully derived when the bubble swarms or other objects distribute in a circular region. This work brings new insights to evaluate mixing quality of different systems practically, which has a high degree of accuracy (the percentage of enhancing achieved is about 40%).

Bibliographical metadata

Original languageEnglish
Pages (from-to)257-261
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume110
Early online date19 Mar 2017
DOIs
StatePublished - 1 Jul 2017