A numerical study on orthokinetic agglomeration in stirred tanks

ED Hollander, JJ Derksen*, HMJ Kramer, GM Van Rosmalen, HEA Van den Akker

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A numerical study on the scale-up behaviour of orthokinetic agglomeration in stirred tanks is presented. Large Eddy flow simulations were performed to obtain an accurate description of the turbulent flow encountered in stirred vessels, equipped with either a Rushton or a pitched blade turbine. Simultaneously, the convection-reaction equation for the particle number concentration is solved. Equal resolutions were used for the flow simulations and the particle concentration equation. Agglomeration was incorporated by making use of the nonlinear agglomeration model proposed by Mumtaz et al. [Trans. Inst. Chem. Eng. 75 (1997) 152]. Reactor performance for vessel sizes in the range of I to 10 000 1 was simulated. Three scale-up rules (viz. constant Re number, specific power input, and impeller tip speed) were investigated. It was found that impeller shape, vessel size, and Re number have a profound effect on reactor performance. (C) 2002 Published by Elsevier Science B.V.

Original languageEnglish
Article numberPII S0032-5910(02)00261-9
Pages (from-to)169-173
Number of pages5
JournalPowder Technology
Volume130
Issue number1-3
Publication statusPublished - 19 Feb 2003
Event7th International Symposium on Agglomeration - ALBI, France
Duration: 29 May 200131 May 2001

Keywords

  • orthokinetic
  • agglomeration
  • turbulence
  • modelling
  • stirred tanks

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