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Estimation of turbulent fragmenting forces in a high-pressure homogenizer from computational fluid dynamics

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Author

Summary, in English

The aim of this study was to find models for turbulent fragmenting forces in the high-pressure homogeniser from data available in Computational Fluid Dynamics (CFD) simulations with Reynolds Averaged Navier Stokes (RANS) turbulence models. In addition to the more common RANS k-epsilon turbulence models, a Multi-scale k-epsilon model was tested since experimental investigations of the geometry imply large differences in behaviour between turbulent eddies of different length-scales. Empiric models for the driving hydrodynamic factors for turbulent fragmentation using the extra information given by multi-scale simulations were developed. These models are shown to give a more reasonable approximation of local fragmentation than models based on the previously used RANS k-epsilon models when comparing to hydrodynamic measurements in an experimental model. (C) 2012 Elsevier Ltd. All rights reserved.

Department/s

Publishing year

2012

Language

English

Pages

309-317

Publication/Series

Chemical Engineering Science

Volume

75

Document type

Journal article

Publisher

Elsevier

Topic

  • Food Engineering
  • Fluid Mechanics and Acoustics

Keywords

  • High-pressure homogenisation
  • Homogenisation
  • Turbulence
  • Fragmentation
  • Hydrodynamics
  • Fluid mechanics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0009-2509