Design and fabrication of a vigorous "cavitation-on-a-chip" device with a multiple microchannel configuration

Rokhsar Talabazar, Farzad and Jafarpour, Mohammad and Zuvin, Merve and Chen, Hongjian and Gevari, Moein Talebian and Villanueva, Luis Guillermo and Grishenkov, Dmitry and Koşar, Ali and Ghorbani, Morteza (2021) Design and fabrication of a vigorous "cavitation-on-a-chip" device with a multiple microchannel configuration. Microsystems and Nanoengineering, 7 (1). ISSN 2055-7434

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Hydrodynamic cavitation is one of the major phase change phenomena and occurs with a sudden decrease in the local static pressure within a fluid. With the emergence of microelectromechanical systems (MEMS), high-speed microfluidic devices have attracted considerable attention and been implemented in many fields, including cavitation applications. In this study, a new generation of ‘cavitation-on-a-chip’ devices with eight parallel structured microchannels is proposed. This new device is designed with the motivation of decreasing the upstream pressure (input energy) required for facile hydrodynamic cavitation inception. Water and a poly(vinyl alcohol) (PVA) microbubble (MB) suspension are used as the working fluids. The results show that the cavitation inception upstream pressure can be reduced with the proposed device in comparison with previous studies with a single flow restrictive element. Furthermore, using PVA MBs further results in a reduction in the upstream pressure required for cavitation inception. In this new device, different cavitating flow patterns with various intensities can be observed at a constant cavitation number and fixed upstream pressure within the same device. Moreover, cavitating flows intensify faster in the proposed device for both water and the water–PVA MB suspension in comparison to previous studies. Due to these features, this next-generation ‘cavitation-on-a-chip’ device has a high potential for implementation in applications involving microfluidic/organ-on-a-chip devices, such as integrated drug release and tissue engineering.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: Ali Koşar
Date Deposited: 01 Sep 2022 22:33
Last Modified: 01 Sep 2022 22:33

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