Controlling the flow structure in fluidized bed: A CFD-DEM approach

D. G. de Oliveira, O. O. Ayeni, C. L. Wu*, K. Nandakumar, J. B. Joshi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


The spontaneous production of meso-scale flow features such as bubbles and slugs during gas-solid fluidization is well known. This has direct impact on chemical engineering design issues such as conversion rates during catalyst regeneration. However, controlling the size and frequency of appearance of such bubbles during fluidization is not well-understood. We can control the hydrodynamics of a gas-solid fluidization by pulsing the gas flow with an oscillating component. This provides us with additional tuning parameters to structure the flow within a specific frequency range. This study shows that ordered, hexagonal and zig-zag bubbling patterns can be obtained through this approach. A coupled Discrete Element Method and Computational Fluid Dynamics was used in this study. Our simulation results agree well with experimental observations, thus validating the CFD-DEM approach to capture such phenomena.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Discrete Element Methods
EditorsXikui Li, Yuntian Feng, Graham Mustoe
PublisherSpringer Science and Business Media, LLC
Number of pages8
ISBN (Print)9789811019258
StatePublished - 2017
Externally publishedYes
Event7th International Conference on Discrete Element Methods, DEM7 2016 - Dalian, China
Duration: 1 Aug 20164 Aug 2016

Publication series

NameSpringer Proceedings in Physics
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941


Conference7th International Conference on Discrete Element Methods, DEM7 2016


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