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

Polgár, György Máté és Agarwal, Charu Atulkumar és Gogate, Parag és Németh, Gábor és Csóka, Levente (2022) Using CFD simulations to investigate the shear stress in hydrodynamic cavitation reactors coupled with experimental validation using colony count measurements. SCIENTIFIC REPORTS, 12 (1). ISSN 2045-2322

Szöveg Using-CFD-simulations-to-investigate-the-shear-stress-in-hydrodynamic-cavitation-reactors-coupled-with-experimental-validation-using-colony-count-measurementsScientific-Reports.pdf Download (1MB)

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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.

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Mű tipusa:	Cikk
SWORD Depositor:	Teszt Sword
Felhasználó:	Csaba Horváth
A mű MTMT azonosítója:	MTMT:33202966
Dátum:	11 Nov 2022 08:48
Utolsó módosítás:	11 Nov 2022 08:48
URI:	http://publicatio.uni-sopron.hu/id/eprint/2532

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