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Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation

This paper aims at investigating the influence of ultrasound power amplitude on liquid behaviour in a low-frequency (24 kHz) sono-reactor. Three types of analysis were employed: (i) mechanical analysis of micro-bubbles formation and their activities/characteristics using mathematical modelling. (ii)...

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Main Authors: Sajjadi, B., Abdul Raman, Abdul Aziz, Ibrahim, Shaliza
Format: Article
Language:English
Published: Elsevier 2015
Subjects:
T Technology (General)
TP Chemical technology
Online Access:http://eprints.um.edu.my/14009/1/Influence_of_ultrasound_power_on_acoustic_streaming_and_micro.pdf
http://eprints.um.edu.my/14009/
http://www.sciencedirect.com/science/article/pii/S1350417714003472
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spelling my.um.eprints.140092019-12-06T07:55:24Z http://eprints.um.edu.my/14009/ Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation Sajjadi, B. Abdul Raman, Abdul Aziz Ibrahim, Shaliza T Technology (General) TP Chemical technology This paper aims at investigating the influence of ultrasound power amplitude on liquid behaviour in a low-frequency (24 kHz) sono-reactor. Three types of analysis were employed: (i) mechanical analysis of micro-bubbles formation and their activities/characteristics using mathematical modelling. (ii) Numerical analysis of acoustic streaming, fluid flow pattern, volume fraction of micro-bubbles and turbulence using 3D CFD simulation. (iii) Practical analysis of fluid flow pattern and acoustic streaming under ultrasound irradiation using Particle Image Velocimetry (Ply). In mathematical modelling, a lone micro bubble generated under power ultrasound irradiation was mechanistically analysed. Its characteristics were illustrated as a function of bubble radius, internal temperature and pressure (hot spot conditions) and oscillation (pulsation) velocity. The results showed that ultrasound power significantly affected the conditions of hotspots and bubbles oscillation velocity. From the CFD results, it was observed that the total volume of the micro-bubbles increased by about 4.95 with each 100 W-increase in power amplitude. Furthermore, velocity of acoustic streaming increased from 29 to 119 cm/s as power increased, which was in good agreement with the PIV analysis. (C) 2014 Elsevier B.V. All rights reserved. Elsevier 2015-05 Article PeerReviewed application/pdf en http://eprints.um.edu.my/14009/1/Influence_of_ultrasound_power_on_acoustic_streaming_and_micro.pdf Sajjadi, B. and Abdul Raman, Abdul Aziz and Ibrahim, Shaliza (2015) Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation. Ultrasonics Sonochemistry, 24. pp. 193-203. ISSN 1350-4177 http://www.sciencedirect.com/science/article/pii/S1350417714003472 doi:10.1016/j.ultsonch.2014.11.013
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
language English
topic T Technology (General)
TP Chemical technology
spellingShingle T Technology (General)
TP Chemical technology
Sajjadi, B.
Abdul Raman, Abdul Aziz
Ibrahim, Shaliza
Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation
description This paper aims at investigating the influence of ultrasound power amplitude on liquid behaviour in a low-frequency (24 kHz) sono-reactor. Three types of analysis were employed: (i) mechanical analysis of micro-bubbles formation and their activities/characteristics using mathematical modelling. (ii) Numerical analysis of acoustic streaming, fluid flow pattern, volume fraction of micro-bubbles and turbulence using 3D CFD simulation. (iii) Practical analysis of fluid flow pattern and acoustic streaming under ultrasound irradiation using Particle Image Velocimetry (Ply). In mathematical modelling, a lone micro bubble generated under power ultrasound irradiation was mechanistically analysed. Its characteristics were illustrated as a function of bubble radius, internal temperature and pressure (hot spot conditions) and oscillation (pulsation) velocity. The results showed that ultrasound power significantly affected the conditions of hotspots and bubbles oscillation velocity. From the CFD results, it was observed that the total volume of the micro-bubbles increased by about 4.95 with each 100 W-increase in power amplitude. Furthermore, velocity of acoustic streaming increased from 29 to 119 cm/s as power increased, which was in good agreement with the PIV analysis. (C) 2014 Elsevier B.V. All rights reserved.
format Article
author Sajjadi, B.
Abdul Raman, Abdul Aziz
Ibrahim, Shaliza
author_facet Sajjadi, B.
Abdul Raman, Abdul Aziz
Ibrahim, Shaliza
author_sort Sajjadi, B.
title Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation
title_short Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation
title_full Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation
title_fullStr Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation
title_full_unstemmed Influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: Mathematical and 3D computational simulation
title_sort influence of ultrasound power on acoustic streaming and micro-bubbles formations in a low frequency sono-reactor: mathematical and 3d computational simulation
publisher Elsevier
publishDate 2015
url http://eprints.um.edu.my/14009/1/Influence_of_ultrasound_power_on_acoustic_streaming_and_micro.pdf
http://eprints.um.edu.my/14009/
http://www.sciencedirect.com/science/article/pii/S1350417714003472
_version_ 1654960660767834112
score 13.211869

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