Assessment of large eddy and RANS stirred tank simulations by means of LDA

H Hartmann*, JJ Derksen, C Montavon, J Pearson, IS Hamill, HEA van den Akker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

170 Citations (Scopus)


Large eddy simulations (LES) and Reynolds-averaged Navier-Stokes (RANS) calculations were performed on the flow in a baffled stirred tank, driven by a Rushton turbine at Re = 7300. The LES methodology provides detailed flow information as velocity fluctuations are resolved down to the scale of the numerical grid. The Smagorinsky and Voke subgrid-scale models used in the LES were embedded in a numerical lattice-Boltzmann scheme for discretizing the Navier-Stokes equations, and an adaptive force-field technique was used for modeling the geometry. The uniform, cubic computational grid had a size of 2403 grid nodes. The RANS calculations were performed using the computational fluid dynamics code CFX 5.5.1. A transient sliding mesh procedure was applied in combination with the shear-stress-transport (SST) turbulence closure model. The mesh used for the RANS calculation consisted of 241464 nodes and 228096 elements (hexahedrons). Phase-averaged and phase-resolved flow field data, as well as turbulence characteristics, based on the LES and RANS results, are compared both mutually and with a single set of experimental data. (C) 2004 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)2419-2432
Number of pages14
JournalChemical Engineering Science
Issue number12
Publication statusPublished - Jun 2004


  • stirred tank
  • mixing
  • turbulence
  • fluid dynamics
  • simulations
  • LDA
  • FLOW


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