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This paper presents a numerical study of the droplet dynamics in a horizontal duct for proton exchange membrane (PEM) fuel cell applications. The inlet velocity of gas is a crucial factor that affects the performance and efficiency of the system. By using the volume of fluid (VOF) method, the behavior of droplets on the surface is studied and the effect of increasing and decreasing wettability for each numerical simulation with different inlet velocity conditions is analyzed. The results obtained for two different cases of simulations where the wall of the duct has been subjected to uniform wettability (θ = 78° and 118°, respectively) are compared. Our method accurately simulates the process of droplets merging and separating. As the Reynolds number increases, droplets are more likely to separate on a hydrophobic surface. The findings provide insight into the behavior of droplets in fuel cell systems.

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Coalescence and Detachment Dynamics of Dual Droplets in a Confinement for Fuel Cell Applications

  • 会议论文

  • 发表日期：

    2025年

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  • Golamur Rahman Khan,
  • Rahikim Tanzim,
  • Anik Sarker,
  • Manash Protim Boruah

摘要

This paper presents a numerical study of the droplet dynamics in a horizontal duct for proton exchange membrane (PEM) fuel cell applications. The inlet velocity of gas is a crucial factor that affects the performance and efficiency of the system. By using the volume of fluid (VOF) method, the behavior of droplets on the surface is studied and the effect of increasing and decreasing wettability for each numerical simulation with different inlet velocity conditions is analyzed. The results obtained for two different cases of simulations where the wall of the duct has been subjected to uniform wettability (θ = 78° and 118°, respectively) are compared. Our method accurately simulates the process of droplets merging and separating. As the Reynolds number increases, droplets are more likely to separate on a hydrophobic surface. The findings provide insight into the behavior of droplets in fuel cell systems.