Effect of software implementation on the result of computational fluid dynamics simulation of circulating fluidized bed risers

Markku Nikku*, Timo Niemi, Sirpa Kallio, Alexander Daikeler

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)
    158 Downloads (Pure)

    Abstract

    While in scientific literature much focus is directed toward model validation, comparison, and even parametric investigations on individual model parameters, the possible effects of the used computational fluid dynamics (CFD) software on the results are largely neglected. In this article, CFD modeling of circulating fluidized beds (CFB) are performed with Ansys Fluent and OpenFOAM to investigate the effect of software implementation on the simulation results. Transient Eulerian–Eulerian simulations are performed of two different laboratory-scale CFB cold models in turbulent and circulating fluidized bed conditions. The same mesh and as identical models and settings as possible are
    utilized on both software. The obtained time-average profiles of pressure, velocity, and solids volume fraction are compared between the software and with
    available measurements. A difference in the granular energy equation was identified between the software, and a modification was made to achieve the same
    formulation. The effect of boundary conditions was also investigated. It was
    found that depending on the case, the software could have a notable effect on
    the results. These differences are found especially in particle distribution, visible
    in the vertical pressure and solids volume fraction profiles as well as in external
    circulation mass flow rates.
    Original languageEnglish
    Article numbere12460
    Number of pages24
    JournalEngineering Reports
    Volume4
    Issue number2
    Early online date22 Sept 2021
    DOIs
    Publication statusPublished - Feb 2022
    MoE publication typeA1 Journal article-refereed

    Keywords

    • CFB
    • CFD
    • software implementation

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