A NUMERICAL STUDY ON MIXING IN THE KENICS STATIC MIXER
Titel:
A NUMERICAL STUDY ON MIXING IN THE KENICS STATIC MIXER
Auteur:
Ling, F. H. Zhang, X.
Verschenen in:
Chemical engineering communications
Paginering:
Jaargang 136 (1995) nr. 1 pagina's 119-141
Jaar:
1995
Inhoud:
Mixing in the Kenics Static Mixer is analyzed in this paper. The velocity field is calculated using helical coordinates. The twist angle per element, ss, and the aspect ratio of a mixing element, L/R, are taken as parameters. Poincare sections show that uniform mixtures cannot be produced for small ss or small L/R, since the corresponding element is either too flat or too short to produce effective mixing. Furthermore, an alternation of mixing windows where uniform mixing takes place and island regions in the parameter space is found using bifurcation analysis. The rate of mixing for various combination of parameters is calculated, based on the evaluation of uniformity using the Kolmogorov test. An optimal design of the element is suggested, which enables producing quality mixtures with minimum pressure drop. A good agreement between simulation of some mixing processes and existing experiments is observed.
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