4.6 Article

Dynamics of a shocked bubble-encapsulated droplet

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APPLIED PHYSICS LETTERS
卷 120, 期 26, 页码 -

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AIP Publishing
DOI: 10.1063/5.0102009

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  1. ETH Zurich
  2. ETH Zurich Postdoctoral Fellowship programme

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This study proposes shock waves as an instant release mechanism for gas-encapsulated droplets, and explores the key factors involved in the release process through numerical and theoretical investigations. Analytical models are derived to predict the water hammer pressure, sheet jet velocity, and droplet drift.
Gas-encapsulated droplets have recently been promoted as an effective technique for fluid transport. Shock waves are herein proposed as an instant release mechanism for the encapsulated fluid, which subsequently discharges into the surroundings. This release process relies on the intricate bubble dynamics and droplet response to the shock driving, which are discovered through numerical and theoretical investigations. The key factors involved in the process, such as the complex shock pattern, pressure amplification, and the generation of a sheet jet cascade, are characterized. These observations are further supported by analytical models derived to predict the water hammer pressure, sheet jet velocity, and droplet drift. (C) 2022 Author(s).

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