Investigation on the effect of venturi geometry variation on microbubble generation

Niellambare, N. and H. H., Mohamad and Erny Afiza, Alias and Nasrul Hadi, Johari (2022) Investigation on the effect of venturi geometry variation on microbubble generation. In: AIP Conference Proceedings. AIP Conference Proceedings; 2nd Energy Security and Chemical Engineering Congress, ESChE 2021 , 3 - 5 November 2021 , Gambang, Kuantan. pp. 1-10., 2610 (050009). ISSN 0094-243X ISBN 978-073544378-5

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Abstract

Venturi nozzle is the simplest method in generating microbubble (MB). However, direct relation between venturi geometry variation and generated bubbles properties namely, bubble mean diameter (BMD) and dissolved oxygen (DO) level remains ambiguous. Thus, this study investigates the effect of outlet angle variation, gas intake and water flowrate on the BMD and DO level. Visualization experiments were performed on six geometry variant of venturi nozzles with fixed inlet angle (19°) and outlet angle of 8°,10° and 12° for Venturi with air intake and 5°, 12° and 45° for Venturi without air intake condition. In addition, the venturi nozzles also tested in varied flowrate of 13, 33 and 66 litre per minute (LPM). As the results, with the increment of outlet angle, the BMD decreases while the DO level increases in all nozzles. The presence of air intake in the nozzles produces larger MBs. Furthermore, The BMD and DO level is proportional to the water flowrate. Overall, the varied geometry parameters induce a difference in BMD which affects the DO level.

Item Type:	Conference or Workshop Item (Lecture)
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Venturi geometry; Microbubble (MB); Gas flowrate; Water flowrate
Subjects:	T Technology > TJ Mechanical engineering and machinery
Faculty/Division:	Institute of Postgraduate Studies College of Engineering Faculty of Mechanical and Automotive Engineering Technology
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	21 Feb 2024 01:27
Last Modified:	21 Feb 2024 01:27
URI:	http://umpir.ump.edu.my/id/eprint/40458
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