Author
Listed:
- Rana Altay
(Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey)
- Abdolali K. Sadaghiani
(Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
Sabanci University Nanotechnology and Application Center (SUNUM), Sabanci University, Tuzla, Istanbul 34956, Turkey)
- M. Ilker Sevgen
(Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey)
- Alper Şişman
(Sabanci University Nanotechnology and Application Center (SUNUM), Sabanci University, Tuzla, Istanbul 34956, Turkey
Faculty of Electrical and Electronics Engineering, Marmara University, Kadikoy, Istanbul 34722, Turkey)
- Ali Koşar
(Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
Sabanci University Nanotechnology and Application Center (SUNUM), Sabanci University, Tuzla, Istanbul 34956, Turkey
Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Sabanci University, Tuzla, Istanbul 34956, Turkey)
Abstract
With many emerging applications such as chemical reactions and ultrasound therapy, acoustic cavitation plays a vital role in having improved energy efficiency. For example, acoustic cavitation results in substantial enhancement in the rates of various chemical reactions. In this regard, an applied acoustic field within a medium generates acoustic streaming, where cavitation bubbles appear due to preexisting dissolved gas in the working fluid. Upon cavitation inception, bubbles can undergo subsequent growth and collapse. During the last decade, the studies on the effects of different parameters on acoustic cavitation such as applied ultrasound frequency and power have been conducted. The bubble growth and collapse mechanisms and their distribution within the medium have been classified. Yet, more research is necessary to understand the complex mechanism of multi-bubble behavior under an applied acoustic field. Various parameters affecting acoustic cavitation such as surface roughness of the acoustic generator should be investigated in more detail in this regard. In this study, single bubble lifetime, bubble size and multi-bubble dynamics were investigated by changing the applied ultrasonic field. The effect of surface roughness on bubble dynamics was presented. In the analysis, images from a high-speed camera and fast video recording techniques were used. Numerical simulations were also done to investigate the effect of acoustic field frequency on bubble dynamics. Bubble cluster behavior and required minimum bubble size to be affected by the acoustic field were obtained. Numerical results suggested that bubbles with sizes of 50 µm or more could be aligned according to the radiation potential map, whereas bubbles with sizes smaller than 10 µm were not affected by the acoustic field. Furthermore, it was empirically proven that surface roughness has a significant effect on acoustic cavitation phenomena.
Suggested Citation
Rana Altay & Abdolali K. Sadaghiani & M. Ilker Sevgen & Alper Şişman & Ali Koşar, 2020.
"Numerical and Experimental Studies on the Effect of Surface Roughness and Ultrasonic Frequency on Bubble Dynamics in Acoustic Cavitation,"
Energies, MDPI, vol. 13(5), pages 1-15, March.
Handle:
RePEc:gam:jeners:v:13:y:2020:i:5:p:1126-:d:327574
Download full text from publisher
Corrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1126-:d:327574. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
We have no bibliographic references for this item. You can help adding them by using this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .
Please note that corrections may take a couple of weeks to filter through
the various RePEc services.