Investigation of mass transfer intensification under power ultrasound irradiation using 3D computational simulation: A comparative analysis

Sajjadi, B, Asgharzadehahmadi, S, Asaithambi, P, Raman, A and Parthasarathy, R 2017, 'Investigation of mass transfer intensification under power ultrasound irradiation using 3D computational simulation: A comparative analysis', Ultrasonics Sonochemistry, vol. 34, pp. 504-518.


Document type: Journal Article
Collection: Journal Articles

Title Investigation of mass transfer intensification under power ultrasound irradiation using 3D computational simulation: A comparative analysis
Author(s) Sajjadi, B
Asgharzadehahmadi, S
Asaithambi, P
Raman, A
Parthasarathy, R
Year 2017
Journal name Ultrasonics Sonochemistry
Volume number 34
Start page 504
End page 518
Total pages 15
Publisher Elsevier
Abstract This paper aims at investigating the influence of acoustic streaming induced by low-frequency (24 kHz) ultrasound irradiation on mass transfer in a two-phase system. The main objective is to discuss the possible mass transfer improvements under ultrasound irradiation. Three analyses were conducted: i) experimental analysis of mass transfer under ultrasound irradiation; ii) comparative analysis between the results of the ultrasound assisted mass transfer with that obtained from mechanically stirring; and iii) computational analysis of the systems using 3D CFD simulation. In the experimental part, the interactive effects of liquid rheological properties, ultrasound power and superficial gas velocity on mass transfer were investigated in two different sonicators. The results were then compared with that of mechanical stirring. In the computational part, the results were illustrated as a function of acoustic streaming behaviour, fluid flow pattern, gas/liquid volume fraction and turbulence in the two-phase system and finally the mass transfer coefficient was specified. It was found that additional turbulence created by ultrasound played the most important role on intensifying the mass transfer phenomena compared to that in stirred vessel. Furthermore, long residence time which depends on geometrical parameters is another key for mass transfer. The results obtained in the present study would help researchers understand the role of ultrasound as an energy source and acoustic streaming as one of the most important of ultrasound waves on intensifying gas-liquid mass transfer in a two-phase system and can be a breakthrough in the design procedure as no similar studies were found in the existing literature.
Subject Chemical Engineering Design
Keyword(s) Acoustic streaming
Computational fluid dynamics (CFD)
Gas-liquid
Mass transfer
Stirred vessel
Ultrasound
DOI - identifier 10.1016/j.ultsonch.2016.06.026
Copyright notice © 2016 Published by Elsevier B.V.
ISSN 1350-4177
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