This study focuses on the dynamics of droplet impact and spreading on a superhydrophobic wedge surface. Understanding these processes is crucial for various natural and technological applications. The numerical investigation considers factors such as Weber number, wedge inclination, and surface wettability. The droplet's impact results in spreading on the superhydrophobic surface, minimizing surface energy. Kistler’s dynamic contact angle model is employed to characterize the superhydrophobic nature of the wedge surface. The simulation is conducted in a 2D planar domain, showing symmetric volume distribution for the droplet fractions impacting the symmetric wedge face. Higher Weber numbers lead to increased average droplet velocity and a faster rate of fall for the centroid. Likewise, greater wedge inclination promotes faster droplet movement on the steeper face compared to the less inclined one. This study provides valuable insights into droplet impact dynamics, contributing to the understanding and control of processing parameters in day-to-day technological applications such as spray cooling, anti-icing, and printing.

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Numerical Investigation of Drop Impact Dynamics on Wedge Surfaces

  • Shibli Khan,
  • Rahul Kumar Mondal,
  • Kanika Thakur,
  • Parmod Kumar

摘要

This study focuses on the dynamics of droplet impact and spreading on a superhydrophobic wedge surface. Understanding these processes is crucial for various natural and technological applications. The numerical investigation considers factors such as Weber number, wedge inclination, and surface wettability. The droplet's impact results in spreading on the superhydrophobic surface, minimizing surface energy. Kistler’s dynamic contact angle model is employed to characterize the superhydrophobic nature of the wedge surface. The simulation is conducted in a 2D planar domain, showing symmetric volume distribution for the droplet fractions impacting the symmetric wedge face. Higher Weber numbers lead to increased average droplet velocity and a faster rate of fall for the centroid. Likewise, greater wedge inclination promotes faster droplet movement on the steeper face compared to the less inclined one. This study provides valuable insights into droplet impact dynamics, contributing to the understanding and control of processing parameters in day-to-day technological applications such as spray cooling, anti-icing, and printing.