What is it about?
The article explores the behavior of deformable compound droplet within a confined channel under pulsatile flow. The research examines how these droplets move and change shape in response to pulsatile fluid velocities using a numerical approach with an in-house solver based on the level-set method. The key parameters investigated include the effects of the Strouhal number, pulsatile flow amplitude, and physical properties such as density ratio, size ratio, and viscosity ratio on the dynamics of the compound droplets. The study shows that a low Strouhal number leads to significant oscillations in flow velocity and greater droplet deformation, while a high Strouhal number results in smoother droplet motion with less deformation. Additionally, it finds that off-centered compound droplets tend to migrate toward the center of the channel.
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Why is it important?
Pulsatile flow mimics natural biological systems, such as blood flow in arteries, making this study relevant for biomedical applications. Understanding how compound droplets behave under pulsatile conditions can lead to better control and efficiency in applications that require precise manipulation of particles or substances within droplets.
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This page is a summary of: Dynamics of a deformable compound droplet under pulsatile flow, Physics of Fluids, August 2024, American Institute of Physics,
DOI: 10.1063/5.0219512.
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