The “Applications of Engineering in Medicine and Biology” Seminar series

Abstract

Due to growing cooling demands as well as emerging global warming and climate change issues, cooling systems should be more efficiently utilized. Boiling is an effective heat transfer mechanism, which has a critical role in many cooling systems. Surface modification is considered as the major approach for boiling heat transfer enhancement. In this talk, the focus will be on the use of microbial bio-coating surfaces for phase change cooling applications. Thermoacidophilic Sulfolobus solfataricus coatings can be implemented using a facile dip coating method on different metallic and non-metallic surfaces. Controlled by drying conditions, the coating can exhibit rough and porous morphologies. When tested in a boiling heat transfer setup, bio-coated surfaces can offer high enhancements in boiling heat transfer. Moreover, the applicability of the proposed bio-coating is also proven in a miniature air conditioning system. The proposed technique is economical, scalable, biocompatible and eco-friendly and could open new lines at the applicability of biotechnology in energy systems.
In the second part of the talk, the focus will be on cavitating flows in microfluidic systems. Cavitation on Chip devices have gained considerable attention as an emerging tool due to its potential to be implemented in a wide range of industrial and medical applications. Biomedical and biotechnology applications of small scale hydrodynamic cavitation will be included in the talk along with research results of the speaker in this field. The speaker will include his contributions to the subject and talk about future research directions in this subject.

Bio

Ali Koşar received the B.S. degree in Mechanical Engineering from Boğaziçi University, Istanbul. He pursued his graduate study in the Department of Mechanical Engineering at Rensselaer Polytechnic Institute. After completing his M.S. and Ph.D. degrees, he worked at Rensselaer Polytechnic Institute as an adjunct faculty member. He joined the Mechatronics Engineering Program at Sabancı University in Fall 2007. His research interests lie in heat and fluid flow in micro/nano domains and boiling and cavitation in micro/nano scale. The results of his research have already generated more than 130 journal articles in prestigious journals. He received many national and international awards such as METU (Middle East Technical University) Prof. Mustafa N. Parlar Foundation Technology Award (2017), Sedat Simavi Foundation Natural Sciences Award (2016), Ten Outstanding Young Persons Turkey Award in Scientific Leadership (TOYP 2015), ASME (American Society of Mechanical Engineers) ICNMM (International Conference on Nanochannels, Microchannels and Minichannels) Outstanding Early Career Award, Japan, Sapporo (2013), Kadir Has Outstanding Young Investigator Award (March 2013), TUBITAK (The Scientific and Technological Research Council of Turkey) Incentive Award (July 2012), and Outstanding Young Researcher Award, Turkish Academy of Sciences (2011). He is currently a Professor at Sabanci University, an Experienced Researcher at Sabanci University Nanotechnology and Applications Center (SUNUM) and the Co-director of Center of Excellence for Functional Surfaces and Interfaces for Nano diagnostics (EFSUN).

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