CFD modeling of a prismatic spouted bed with two adjustable gas inlets

Authors

  • Oliver Gryczka,

    1. Institute of Solids Process Engineering and Particle Technology, Hamburg University of Technology, Denicke Str. 15, 21073 Hamburg, Germany
    2. Faculty of Process and Systems Engineering, Otto-von-Guericke-University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
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  • Stefan Heinrich,

    Corresponding author
    1. Institute of Solids Process Engineering and Particle Technology, Hamburg University of Technology, Denicke Str. 15, 21073 Hamburg, Germany
    • Institute of Solids Process Engineering and Particle Technology, Hamburg University of Technology, Denicke Str. 15, 21073 Hamburg, Germany
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  • Niels G. Deen,

    1. Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Martin van Sint Annaland,

    1. Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Johannes A.M. Kuipers,

    1. Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Lothar Mörl

    1. Faculty of Process and Systems Engineering, Otto-von-Guericke-University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
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Abstract

Since the invention of the spouted bed technology by Mathur and Gishler (1955), different kinds of apparatus design were developed and a huge number of applications in nearly all branches of industry have emerged. Modeling of spouted beds by means of modern simulation tools, like discrete particle models or continuum models, has become a precious opportunity to understand the complexity of multiphase flows in these apparatus. In this work, two-dimensional continuum simulations of a novel kind of spouted bed apparatus with adjustable gas inlets are presented. Different gas–particle drag models are used to obtain a realistic flow structure. Simulated solid phase concentrations are compared with images taken during experiments. Furthermore, simulated and measured gas phase pressure fluctuations over the entire bed are contrasted allowing more accurate comparisons between the simulated and the real hydrodynamic behaviour of the spouted bed.

Abstract

Depuis l'invention de la technologie du lit jaillissant par Mathur et Gishler (1955), une grande variété de systèmes a été mise au point et un nombre considérable d'applications dans presque toutes les branches de l'industrie ont vu le jour. La modélisation de lits jaillissants au moyen d'outils de simulation modernes, tels que les modèles de particules discrets ou les modèles en continu, est une excellente occasion pour comprendre la complexité des écoulements multiphasiques dans ces appareils. Dans ce travail, des simulations en continu bidimensionnelles d'une nouveau type de lit jaillissant avec des entrées de gaz ajustables sont présentées. On a testé différents modèles de traînée gaz-particules pour obtenir une structure d'écoulement réaliste. Les concentrations de phases solides simulées sont comparées à des images prises lors des expériences. Par ailleurs, les fluctuations de pression de phase gazeuse simulées et mesurées dans la totalité du lit sont contrastées, ce qui permet des comparaisons plus précises entre le comportement hydrodynamique simulé et réel du lit jaillissant.

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