Tagawa Yoshiyuki:Tenured Faculties|TUAT's tenure-track program

Research Support Office Research Advancement Division. Tokyo University of Agriculture and Technology

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Tagawa Yoshiyuki

Affiliation	Institute of Engineering
Division	Division of Advanced Mechanical Systems Engineering
Research field	Fluid mechanics
Keyword(S)	Microfluidics, Medical application, Multiphase flow
Url	http://web.tuat.ac.jp/~tagawayo/

Research experience	･Apr. 2008 - Mar. 2009: JSPS Research Fellow of the Japan Society for the Promotion (DC2) at The University of Tokyo of Science ･Apr. 2009 - Mar. 2010: JSPS Research Fellow of the Japan Society for the Promotion (PD) at The University of Tokyo of Science ･Apr. 2010 - Mar. 2012: Post-doc, University of Twente ･Apr. 2012 - Dec. 2012: FOM research fellow (University of Twente) ･Jan. 2013 - Dec. 2017: Associate Professor, Tokyo University of Agriculture and Technology ･Jan. 2018 - Nov. 2020: Associate Professor(Tenured), Tokyo University of Agriculture and Technology ･Dec.2020 - Present: Professor(Career Challenge), Tokyo University of Agriculture and Technology
Educational background	･2004: Batchelor degree at Dept. Mech. Eng., The University of Tokyo ･2006: Master degree at Dept. Mech. Eng., The University of Tokyo ･2004: Ph. D degree at Dept. Mech. Eng., The University of Tokyo
Awards	* The latest information is shown at the member's website. (At 2019) ･Andrea Prosperetti Award(2019) ･Slow Motion Video Award 2016 ･Prize for best high-speed video @ Droplets 2015 ･Excellent Student Presentation Award (The Japanese Society for Multiphase flow 2004)
Selected papers and publications	* The latest information is shown at the member's website. (At Jan. 2013) ･Tagawa, Y., Oudalov, N., Visser, C.W., Peters, I., van der Meer, D., Sun, C., Prosperetti, A., and Lohse, D., 2012, “Highly focused supersonic microjet”, Physical Review X, Vol. 2, 031002. ･Tagawa, Y., Martinez-Mercado, J., Prakash, V.N., Calzavarini, E., Sun, C., and Lohse, D., 2012, “Three-dimensional Lagrangian Voronoi analysis for clustering of particles and bubbles in turbulence”, Journal of Fluid Mechanics, Vol. 693, pp.201-215. ･Tagawa, Y., Oudalov, N., Ghalbzouri, A. El, Sun, C., and Lohse, D., 2013, “Needle-free injection into skin and soft matter with highly focused microjets”, Lab on a Chip, Vol. 13 (7), pp. 1357-1363. ･Tagawa, Y., Roghair, I., Martin van Sint Annaland, Kuipers, H., Sun, C., and Lohse D., 2013, “The clustering morphology of freely rising deformable bubbles”, Journal of Fluid Mechanics (in press) ･Tagawa, Y., Funakubo, A., Takagi, S. and Matsumoto Y., 2010, “A single bubble 3D motion in dilute surfactant solution (2nd report, Forces and Slip Conditions on a Bubble in Quasi-steady Motion) (in Japanese)”, Transactions of the Japan Society of Mechanical Engineers, Series B, Vol. 78, pp.723-733. ･Prakash V.N., Tagawa, Y., Calzavarini, E., Martinez-Mercado, J., Toschi, F., Sun, C., and Lohse, D., 2012, “How gravity and size affect the acceleration statistics of bubbles in turbulence”, New Journal of Physics, Vol. 14, 105017 ･Visser, C.W., Tagawa, Y., Sun, C., and Lohse, D., 2012, “Microdroplet impact at high velocity”, Soft Matter, Vol. 8, pp.10732-10737. ･Martinez-Mercado, J., Prakash, V.N., Tagawa, Y., Sun, C., and Lohse, D., 2012, “Lagrangian statistics of light particles in turbulence”, Physics of Fluids, Vol. 24, 055106

Research Description

Microfluidics is one of the essential parts for modern technologies due to their potential and wide applications. From fluid dynamical point of view, however, fluid viscosity is dominant for most of the phenomena. This results in having severe limitations for some important processes such as surface cleaning, mixing, and impacting onto soft materials by fluids. Here we investigate high-speed microjet which travels upto 850 m/s with highly-focused shape (Tagawa et al. 2012 Phys. Rev. X). In contrast with existing microfluidics systems, the mechanism of the microjet is inertia dominant, which could open a new door for new technologies. One of the attractive applications is the development of needle-free injection devices. The needle-free system offer the perspect to solve problems related to conventional needle injection systems, e.g. contamination, needle-stick injuiries, and painful injections. The use of this highly-focused microjet could lead the realization of the new needle-free injection system. Another possible applications using great potential of the high-speed microjets will be further investigated.

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About TUAT's tenure-track program

The Tenure Track Program is a relatively new attempt for universities in Japan.
In order to survive against the severe competition among world universities, this system is one of the important tests for the future success of Japanese universities.
TUAT Tenure Track Program earns sterling praise due to enough support for start-up grant and reasonable reduction of the burden of education and management. Appropriate advice of the mentor professor can also greatly help my progress.
I appreciate this valuable opportunity to contribute the development of science, technology, and education in Japan.

Future aspirations

My current interests are in bubbles/droplets dynamics and micro-scale fluid mechanics with high Reynolds numbers. I would like to promote international collaborations/joint researches and support students for having a global perspective.