Toward Lab-in-a-drop: Acoustic manipulation of droplets in air (Koji Hasegawa)

June 22, 2023, 2:00 p.m. (CEST)

Time: June 22, 2023, 2:00 p.m. – 3:30 p.m.
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In the course of the Multiphase Flow Seminar of the Institute of Aerospace Thermodynamics (ITLR), SimTech and  ITLR guest researcher Koji Hasegawa from Kogakuin University of Technology & Engineering will give a talk on

"Toward Lab-in-a-drop: Acoustic manipulation of droplets in air"

The manipulation of droplets in air by acoustic fields has attracted great attention in various fields, including analytical chemistry, biology, medicine, and materials science. To realize this contactless droplet manipulation, a deeper understanding of the interfacial dynamics of droplets levitated in an acoustic field, along with the flow and heat/mass transport phenomena within and surrounding these droplets, is essential. While the development of measurement methods and the establishment of analytical techniques are crucial for illuminating these phenomena, the complexity of the dynamics (non-stationarity, non-linearity, and non-equilibrium) within acoustically levitated droplets needs to be comprehensively explored. This seminar will outline the proof-of-concept process for "lab-in-a-drop" using contactless droplet manipulation driven by an acoustic field. This approach represents a significant step towards a comprehensive understanding of these phenomena and the ongoing challenge of elucidating the underlying physics. The following topics will be covered: the principle of acoustic levitation, levitation stability (atomization), droplet group levitation, droplet transport and coalescence, mixing dynamics with novel visualization, evaporation of pure, binary, and ternary droplets.

Koji Hasegawa's field of expertise includes multiphase flows, thermo-fluid dynamics, non-Newtonian fluids, nonlinear acoustics in both simulation and experimental work.

The lecture will be held in hybrid form in the ITLR seminar room (Pfaffenwaldring 31, 1.103) and virtually via Webex

Abstract Koji Hasegawa 

[Picture: Kogakuin University]


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