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Using CFD simulations to investigate the shear stress in hydrodynamic cavitation reactors coupled with experimental validation using colony count measurements

Scientific reports, 2022-10, Vol.12 (1), p.18034-18034, Article 18034 [Peer Reviewed Journal]

2022. The Author(s). ;The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2022 ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/s41598-022-20349-7 ;PMID: 36302786

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  • Title:
    Using CFD simulations to investigate the shear stress in hydrodynamic cavitation reactors coupled with experimental validation using colony count measurements
  • Author: Polgár, Máté ; Agarwal, Charu ; Gogate, Parag ; Németh, Gábor ; Csóka, Levente
  • Subjects: Bioreactors ; Cavitation ; Colonies ; Computer Simulation ; Geometry ; Hydrodynamics ; Reactors ; Shear stress ; Simulation ; Stress, Mechanical
  • Is Part Of: Scientific reports, 2022-10, Vol.12 (1), p.18034-18034, Article 18034
  • Description: The current work investigates the shear stress distribution in hydrodynamic cavitation reactors with two different geometries using CFD simulations. Venturi type (positive geometry) and bore (negative geometry) were used to induce cavitation. Experimental validation of the predictions from simulations was also conducted by calculating the reduction rate in the colony count of Legionella pneumophila, a pathogenic bacterial strain. Both the numerical and experimental studies revealed the significant influence of the shape of the cavitation-inducing geometry on the flow characteristics and the distribution of shear stress. The simulation data indicated high shear stress formation in the positive geometry as a venturi, with the cavitation ranges for the two reactors being far apart from each other. The experimental study also confirmed that the flow conditions in the venturi-type reactor were more favourable compared to the bore geometry, resulting in a bacterial reduction efficiency as high as 99.98%. It was clearly demonstrated that the geometry of the cavitating device plays a crucial role in deciding the shear stress and its efficacy for the desired applications as per the predictions of the simulation model validated by the experimental results.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/s41598-022-20349-7
    PMID: 36302786
  • Source: MEDLINE
    PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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