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Research Article | Open Access

Modeling of solid-particle effects on bubble breakage and coalescence in slurry bubble columns

Adam Mühlbauer, Mark W. Hlawitschka( ), Hans-Jörg Bart
Lehrstuhl für Thermische Verfahrenstechnik, Technische Universität Kaiserslautern, Gottlieb-Daimler-Straße 44, 67663 Kaiserslautern, Germany
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Abstract

Solid particles heavily affect the hydrodynamics in slurry bubble columns. The effects arise through varying breakup and coalescence behavior of the bubbles with the presence of solid particles where particles in the micrometer range lead to a promotion of coalescence in particular. To simulate the gas-liquid-solid flow in a slurry bubble column, the Eulerian multifluid approach can be employed to couple computational fluid dynamics (CFD) with the population balance equation (PBE) and thus to account for breakup and coalescence of bubbles.

In this work, three approaches are presented to modify the breakup and coalescence models to account for enhanced coalescence in the coupled CFD-PBE framework. The approaches are applied to a reference simulation case with available experimental data. In addition, the impacts of the modifications on the simulated bubble size distribution (BSD) and the applicability of the approaches are evaluated. The capabilities as well as the differences and limits of the approaches are demonstrated and explained.

Keywords

breakup and coalescenceCFD simulationpopulation balance equationslurry bubble columnsolid-particle effect

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Experimental and Computational Multiphase Flow
Volume 3 Issue 4,
December 2021
Pages 303-317
DOI: 10.1007/s42757-020-0078-y
Cite this article:
Mühlbauer A, Hlawitschka MW, Bart H-J. Modeling of solid-particle effects on bubble breakage and coalescence in slurry bubble columns. Experimental and Computational Multiphase Flow, 2021, 3(4): 303-317. https://doi.org/10.1007/s42757-020-0078-y

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Received: 27 February 2020
Revised: 04 May 2020
Accepted: 14 May 2020
Published: 16 November 2020
© The Author(s) 2020

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