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Titre du document / Document title

Effectiveness of power low fluid mixing in stirred reactors utilising new fluid-foil blades

Auteur(s) / Author(s)

NIKOV I. ; VLAEV S. D. ; MARTINOV M. ;

Résumé / Abstract

Mixing effectiveness based on local skin-friction drag over immersed particles in stirred tank reactors, equipped with fluid-foil impeller NS is targeted. An attempt is made to uncover external flow friction conditions effecting dispersion mechanisms in power law fluid media, corresponding to different impeller types. The local skin-friction force and drag are determined based on shear stress and shear rate data, generated by electrochemical measurement of the ion transport in the diffusion boundary layer by means of a spherical probe. A summary of flow uniformity is worked out as well as the field of friction drag force and drag coefficient relevant to mixing intensity specific for various impeller designs and rheological properties. It is shown that compared to flat-blade impellers, the fluid foil blades ensure a higher effectiveness, identified by comparable friction drag at lower power input that is presumably due to lower pressure drag.

Revue / Journal Title

Bulgarian chemical communications    ISSN  0861-9808 

Source / Source

2005, vol. 37, no2, pp. 126-130 [5 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Bulgarian Academy of Sciences, Sofia, BULGARIE  (1992) (Revue)

Mots-clés d'auteur / Author Keywords

mixing

;

effectiveness

;

friction-drag mapping

;

fluid-foil blades

;

Localisation / Location

INIST-CNRS, Cote INIST : 14001, 35400013230710.0100

Nº notice refdoc (ud4) : 16964077



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