Flow dynamics in a four-inch downer using solids concentration measurements

B. Wu, J. X. Zhu, L. Briens, H. Zhang

Research output: Journal PublicationArticlepeer-review

12 Citations (Scopus)


Local solids concentration fluctuations were measured in a long downer reactor (0.1 m ID, 9.3 m tall) using an optical fiber probe. Axial flow development and radial flow dynamics were analyzed using both statistical and chaos methods. Core, transition and annulus regions were identified and each region showed different flow behavior. Cross-sectional averaged chaos parameters were correlated to cross-sectional averaged solids holdup to develop relationships between non-linear flow dynamics and operating conditions. Crown

Original languageEnglish
Pages (from-to)187-193
Number of pages7
JournalPowder Technology
Issue number3
Publication statusPublished - 25 Sept 2007
Externally publishedYes


  • Chaos analysis
  • Downer
  • Flow dynamics
  • Solids concentration

ASJC Scopus subject areas

  • Chemical Engineering (all)


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