Seminar"The influence of surfactants on bubble bursting and air-liquid-air sheets"Jun Eshima

Micro/Bio/Nanofluidics (Shen) Unit and Mechanics and Materials Unit (Fried U) would like to invite you to the seminar by Jun Eshima on July 22 (Tuesday).
 
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Date:           July 22, 2025
Time:          15:00-16:00
Venue:         B503, OIST
Zoom:          https://oist.zoom.us/j/92713819316?pwd=Fq5nVIGpi8abkkfIlfOMCo3UKTpEP8.1
Meeting ID: 927 1381 9316
Passcode:     418693
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Speaker:

Jun Eshima
Princeton University, USA

Title:

The influence of surfactants on bubble bursting and air-liquid-air sheets

Abstract:

When bubbles burst at a liquid-air interface, drops can be ejected to form aerosols. Investigating the details of how, why, and when such bubbles burst is key to understanding the resulting aerosol distribution, which is important for the environment, health, and industry. For example sea spray aerosols control ocean-atmosphere mass transfer and act as seeds for cloud formation. In reality, liquid-air interfaces are often contaminated with surfactants of biological and human-made origins. In this talk, the effect of surfactants on bubble bursting will be discussed. Specifically, the fluid dynamics of inertial surfactant deposition on thin air-liquid-air sheets will be analysed, which is thought to be a model problem for how the cap of a surface bubble ruptures. Some recent results on the effect of surfactants on jet drops will also be discussed. The tools used include asymptotics, similarity solutions, and direct numerical simulations of the Navier-Stokes equations (validated against experimental data.

Bio:

I am a rising fourth year PhD student in Mechanical and Aerospace Engineering at Princeton University, co-advised by Profs. Luc Deike and Howard A. Stone.

Co-Host:
Prof. Amy Shen
Prof. Eliot Fried