Turbulent Flow in Stirred Tanks: Scale-Up Computations for Vessel Hydrodynamics

Gregory W. Smith, Lawrence L. Tavlarides, Jiri Placek

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A numeric model for turbulent flow was used to compute the flow patterns in Rushton turbine agitated vessels. The cases considered cover two orders of magnitude for the three different scaling criteria of constant impeller Reynolds number, power input per unit mass, and impeller tip speed. The constant power input scale-up criteria maintains the turbulence levels throughout the vessel during scale-up. The circulation times, however, increase with vessel size for this scaling criteria. The other scaling criteria of constant impeller tip speed and impeller Reyonds number lead to decreasing turbulence levels in the tank alone with further increases in circulation times.

Original languageEnglish (US)
Pages (from-to)49-73
Number of pages25
JournalChemical Engineering Communications
Volume93
Issue number1
DOIs
StatePublished - Jun 1990

Keywords

  • Stirred tank scale-up
  • Two-scale turbulence model

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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