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

Andreas Håkansson, Fredrik Innings, Johan Revstedt, Christian Trägårdh, Björn Bergenståhl

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Sammanfattning

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–ε turbulence models, a Multi-scale k–ε 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–ε models when comparing to hydrodynamic measurements in an experimental model.

OriginalspråkEngelska
Sidor (från-till)309-317
Antal sidor8
TidskriftChemical Engineering Science
Volym75
DOI
StatusPublicerad - 2012
Externt publiceradJa

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