Virtual Seminar"Explosive boiling of drops near a solid surface and inside a turbulent flow"Chao Sun


Wednesday, January 12, 2022 - 16:00




Micro/Bio/Nanofluidics (Shen) Unit would like to invite you to the virtual seminar by Prof. Chao Sun on January 12 (Wednesday).
Date: Wednesday, January 12, 2022
Time: 16:00-17:00
**Zoom session

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Meeting ID: 956 7634 7700
Passcode: 583170


Prof. Chao Sun
Center for Combustion Energy &
Department of Energy and Power Engineering &
Department of Engineering Mechanics
Tsinghua University, Beijing


Explosive boiling of drops near a solid surface and inside a turbulent flow


In this talk, we will discuss two problems. The first problem is about the evaporation dynamics of Leidenfrost drops. The gasification of multicomponent drops is relevant in various energy-related technologies. An interesting phenomenon associated with this process is the self-induced explosion of the drop, which promotes drop atomization. We study a unique explosive gasification process of a suspension (solid-liquid) droplet and a tri-component (liquid-liquid) droplet in a levitated Leidenfrost state. The second problem is about turbulent flow with boiling drops. Turbulence is known for its ability to vigorously mix fluid and transport heat. We have conceptualized a kind of “active particle” turbulence, which far exceeds the limits of classical thermal turbulence. By adding a minute concentration of a heavy liquid (hydrofluoroether) to a water-based turbulent convection system, a remarkably efficient biphasic dynamics is born. We find that the heat transfer enhancement is dominated by the kinematics of the active elements (bubbles and drops) and their induced-agitation.


Prof. Amy Shen

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