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Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis

Hydrodynamic cavitation (HC) in the Venturi nozzle, apart from the harmful influence on the devices, can be used to improve a range of industrial processes, such as biofuel generation, emulsion preparation, and wastewater treatment. The present investigation deals with the influence of dissolved air...

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Autores principales: Hasani Malekshah, Emad, Wróblewski, Włodzimierz, Majkut, Mirosław
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9568849/
https://www.ncbi.nlm.nih.gov/pubmed/36244095
http://dx.doi.org/10.1016/j.ultsonch.2022.106199
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author Hasani Malekshah, Emad
Wróblewski, Włodzimierz
Majkut, Mirosław
author_facet Hasani Malekshah, Emad
Wróblewski, Włodzimierz
Majkut, Mirosław
author_sort Hasani Malekshah, Emad
collection PubMed
description Hydrodynamic cavitation (HC) in the Venturi nozzle, apart from the harmful influence on the devices, can be used to improve a range of industrial processes, such as biofuel generation, emulsion preparation, and wastewater treatment. The present investigation deals with the influence of dissolved air in Venturi cavitating flow based on numerical and experimental approaches. The experimental campaigns have been done in a closed-loop water tunnel equipped with a Venturi test section. The post-processing techniques such as Fast Fourier Transform (FFT), Power Spectral Density (PSD), temporal/spatial Grey Level distribution and mean value grey level distribution are employed to analyse the experimental observations and measurement. The URANS numerical method is modified based on the Density Corrected-Based Model (DCM) to be more adaptable for flows with high differences in density. The results approve the remarkable effect of dissolved air on the configuration of the cavity, its evolution process, and transient/averaged characteristics. It is observed that the incipient point and ratio of sheet cavity length to cloud cavity length are changed. Furthermore, the flow velocity inside of the sheet and cloud cavities is different; as well as, the higher content of dissolved air leads to slower flow velocity inside the cloud cavity. In addition, the shedding frequency is significantly reduced in case of higher level of air content.
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spelling pubmed-95688492022-10-16 Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis Hasani Malekshah, Emad Wróblewski, Włodzimierz Majkut, Mirosław Ultrason Sonochem Short Communication Hydrodynamic cavitation (HC) in the Venturi nozzle, apart from the harmful influence on the devices, can be used to improve a range of industrial processes, such as biofuel generation, emulsion preparation, and wastewater treatment. The present investigation deals with the influence of dissolved air in Venturi cavitating flow based on numerical and experimental approaches. The experimental campaigns have been done in a closed-loop water tunnel equipped with a Venturi test section. The post-processing techniques such as Fast Fourier Transform (FFT), Power Spectral Density (PSD), temporal/spatial Grey Level distribution and mean value grey level distribution are employed to analyse the experimental observations and measurement. The URANS numerical method is modified based on the Density Corrected-Based Model (DCM) to be more adaptable for flows with high differences in density. The results approve the remarkable effect of dissolved air on the configuration of the cavity, its evolution process, and transient/averaged characteristics. It is observed that the incipient point and ratio of sheet cavity length to cloud cavity length are changed. Furthermore, the flow velocity inside of the sheet and cloud cavities is different; as well as, the higher content of dissolved air leads to slower flow velocity inside the cloud cavity. In addition, the shedding frequency is significantly reduced in case of higher level of air content. Elsevier 2022-10-11 /pmc/articles/PMC9568849/ /pubmed/36244095 http://dx.doi.org/10.1016/j.ultsonch.2022.106199 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Short Communication
Hasani Malekshah, Emad
Wróblewski, Włodzimierz
Majkut, Mirosław
Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis
title Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis
title_full Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis
title_fullStr Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis
title_full_unstemmed Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis
title_short Dissolved air effects on three-phase hydrodynamic cavitation in large scale Venturi- Experimental/numerical analysis
title_sort dissolved air effects on three-phase hydrodynamic cavitation in large scale venturi- experimental/numerical analysis
topic Short Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9568849/
https://www.ncbi.nlm.nih.gov/pubmed/36244095
http://dx.doi.org/10.1016/j.ultsonch.2022.106199
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AT majkutmirosław dissolvedaireffectsonthreephasehydrodynamiccavitationinlargescaleventuriexperimentalnumericalanalysis