CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair

The use of synthetic jet in enhancing mixing ensures the success of many applications, including biomedical devices and chemical processing. Previous studies have found that modifications of the orifice edges and orifice width can alter the jet flow characteristics particularly in regard to flow mix...

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Main Author:	Hong, Mun Hoh
Format:	Thesis
Language:	English English
Published:	2020
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/25400/1/CFD%20Simulations%20Of%20Enhancement%20Of%20Jet%20Mixing%20By%20Lateral%20Synthetic%20Jet%20Pair.pdf http://eprints.utem.edu.my/id/eprint/25400/2/CFD%20Simulations%20Of%20Enhancement%20Of%20Jet%20Mixing%20By%20Lateral%20Synthetic%20Jet%20Pair.pdf
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id	my-utem-ep.25400
record_format	uketd_dc
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Cheng, See Yuan
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Hong, Mun Hoh CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair
description	The use of synthetic jet in enhancing mixing ensures the success of many applications, including biomedical devices and chemical processing. Previous studies have found that modifications of the orifice edges and orifice width can alter the jet flow characteristics particularly in regard to flow mixing behaviours. It is expected that a change in these parameters could improve the mixing effectiveness of jet mixing technique. Therefore, the main goal of this research was to investigate the mixing characteristics of synthetic jet under the influence of various orifice edge configurations at different orifice width. First, a CFD model was developed for the evaluation of synthetic-jet-enhanced mixing performance in a mixing channel. The numerical modelling utilized a viscous laminar model to simulate the unsteady incompressible flow 3D model under a net flow Reynolds number of 83. Validation and verifications were conducted to examine the quality of the results. The mixing mechanisms and influence of three different orifice edges configurations (sharp, rounded, and chamfered) at different orifice widths (1.6, 2.4 and 4 mm) on the mixing degree between two fluid streams were then identified and discussed. The findings indicated that there is an optimal ratio of orifice width to the width of the mixing channel (d/h = 0.3), which will give the best mixing degree with a value of 0.6584 for a given width of the mixing channel with sharp-edged orifice. The findings also revealed that the rounded orifice showed the best mixing degree with a value of 0.6201 at lower d/h whereas the sharp-edged orifice showed the best mixing degree with a value of 0.6584 at higher d/h. This research work will serve as a guideline for selecting a suitable orifice width and orifice edge configuration to enhance the mixing performance of a synthetic-jet-assisted fluid mixer.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Master's degree
author	Hong, Mun Hoh
author_facet	Hong, Mun Hoh
author_sort	Hong, Mun Hoh
title	CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair
title_short	CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair
title_full	CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair
title_fullStr	CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair
title_full_unstemmed	CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair
title_sort	cfd simulations of enhancement of jet mixing by lateral synthetic jet pair
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty Of Mechanical Engineering
publishDate	2020
url	http://eprints.utem.edu.my/id/eprint/25400/1/CFD%20Simulations%20Of%20Enhancement%20Of%20Jet%20Mixing%20By%20Lateral%20Synthetic%20Jet%20Pair.pdf http://eprints.utem.edu.my/id/eprint/25400/2/CFD%20Simulations%20Of%20Enhancement%20Of%20Jet%20Mixing%20By%20Lateral%20Synthetic%20Jet%20Pair.pdf
_version_	1747834118808272896
spelling	my-utem-ep.254002021-11-17T09:21:16Z CFD Simulations Of Enhancement Of Jet Mixing By Lateral Synthetic Jet Pair 2020 Hong, Mun Hoh T Technology (General) TA Engineering (General). Civil engineering (General) The use of synthetic jet in enhancing mixing ensures the success of many applications, including biomedical devices and chemical processing. Previous studies have found that modifications of the orifice edges and orifice width can alter the jet flow characteristics particularly in regard to flow mixing behaviours. It is expected that a change in these parameters could improve the mixing effectiveness of jet mixing technique. Therefore, the main goal of this research was to investigate the mixing characteristics of synthetic jet under the influence of various orifice edge configurations at different orifice width. First, a CFD model was developed for the evaluation of synthetic-jet-enhanced mixing performance in a mixing channel. The numerical modelling utilized a viscous laminar model to simulate the unsteady incompressible flow 3D model under a net flow Reynolds number of 83. Validation and verifications were conducted to examine the quality of the results. The mixing mechanisms and influence of three different orifice edges configurations (sharp, rounded, and chamfered) at different orifice widths (1.6, 2.4 and 4 mm) on the mixing degree between two fluid streams were then identified and discussed. The findings indicated that there is an optimal ratio of orifice width to the width of the mixing channel (d/h = 0.3), which will give the best mixing degree with a value of 0.6584 for a given width of the mixing channel with sharp-edged orifice. The findings also revealed that the rounded orifice showed the best mixing degree with a value of 0.6201 at lower d/h whereas the sharp-edged orifice showed the best mixing degree with a value of 0.6584 at higher d/h. This research work will serve as a guideline for selecting a suitable orifice width and orifice edge configuration to enhance the mixing performance of a synthetic-jet-assisted fluid mixer. 2020 Thesis http://eprints.utem.edu.my/id/eprint/25400/ http://eprints.utem.edu.my/id/eprint/25400/1/CFD%20Simulations%20Of%20Enhancement%20Of%20Jet%20Mixing%20By%20Lateral%20Synthetic%20Jet%20Pair.pdf text en validuser http://eprints.utem.edu.my/id/eprint/25400/2/CFD%20Simulations%20Of%20Enhancement%20Of%20Jet%20Mixing%20By%20Lateral%20Synthetic%20Jet%20Pair.pdf text en public https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=119740 phd masters Universiti Teknikal Malaysia Melaka Faculty Of Mechanical Engineering Cheng, See Yuan 1. Abbas, Y., Miwa, J., Zengerle, R., and Stetten, F. V., 2013. Active Continuous-Flow Micromixer Using an External Braille Pin Actuator Array. Micromachines, 4, pp. 80–89. 2. Afzal, A., and Kim, K., 2015a. 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