On cavitation inception and cavitating flow patterns in a multi-orifice microfluidic device with a functional surface

Hosseinpour Shafaghi, Ali and Rokhsar Talabazar, Farzad and Zuvin, Merve and Talebian Gevari, Moein and Villanueva, Luis Guillermo and Ghorbani, Morteza and Koşar, Ali (2021) On cavitation inception and cavitating flow patterns in a multi-orifice microfluidic device with a functional surface. Physics of Fluids, 33 (3). ISSN 1070-6631 (Print) 1089-7666 (Online)

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During the last decade, hydrodynamic cavitation has been implemented in various applications such as energy harvesting and biomedical applications. Facile hydrodynamic cavitation methods are required for fulfilling the requirements in these applications. In this study, a new generation microfluidic device containing eight parallel micro-orifices with a new design was fabricated and tested with the purpose of intensifying the cavitating flows and early cavitation inception. The roughness elements in the micro-orifices facilitated cavitation inception. This study presents a general perspective of occurrence of different cavitating flow patterns in microscale and addresses the ambiguities about the conditions for the formation of a specific flow pattern. Cavitation inception occurred with the appearance of small bubbles emerging from roughness elements at a rather low upstream pressure in the open loop experimental setup. A reduction in the cavitation number resulted in the formation of different flow patterns such as cavitation clouds, twin cavities, sheet cavities, and bubbly flows. Having several flow patterns with different intensities all together within a single microfluidic device is the main advantage of the proposed device over the state of the art microfluidic devices. Generation of flow patterns with various released energy levels makes this proposed device a unique multi-functional platform, which can be implemented to a lab on a chip platform for applications such as nanoparticle synthesis and wound healing.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Mechatronics
Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: Ali Koşar
Date Deposited: 18 Aug 2022 12:36
Last Modified: 18 Aug 2022 12:36
URI: https://research.sabanciuniv.edu/id/eprint/43323

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