Prediction of the induced gas flow rate from a self-inducing impeller with CFD

Claudio P. Fonte, Bruno S. Pinho, Vania Santos-Moreau, José Carlos B Lopes

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The complex task of describing computationally two-phase turbulent flows in aerated stirred-tank reactors was overcome by proposing that the gas flow rate in the hollow impeller can be estimated from single-phase flow simulations of the liquid phase in the reactor: the pressure at the impeller surface obtained from liquid phase simulations can be related to the gas induction rate. A commercial lab-scale reactor with a radial six-bladed hollow impeller was chosen for the study. To validate the presented methodology, the induced gas flow rate was measured experimentally from the tracking of the position of bubbles in a dynamic sequence of flow images. Notwithstanding the simplifications assumed in the presented CFD methodology, good agreement has been obtained between numerical results and experiments.

    Original languageEnglish
    Pages (from-to)571-579
    Number of pages9
    JournalChemical Engineering and Technology
    Volume37
    Issue number4
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Computational fluid dynamics
    • Mixing
    • Self-inducing impeller
    • Stirred-tank reactor
    • Turbulence modeling

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