Effects of ridge parameters on axial spreading of droplet impact on superhydrophobic surfaces

Superhydrophobic surfaces decorated with macrostructures have presented remarkable potential in diverse engineering fields, such as aircraft anti-icing. Understanding the effects of structure shape and size on droplet dynamics is crucial to design application surfaces. Herein, we investigate maximum axial spreading for droplets impacting ridged superhydrophobic varied ridge shapes sizes. We propose a mathematical formula describe profiles quantified by factor, which easily applied structure-related studies. The coefficient are clarified. inhibited due outward flow liquid above tip. reduces when becomes sharper, can be achieved increasing factor or height–width ratio. complex effect ridge–droplet ratio divided into two regimes according factor. Furthermore, prediction correlation established, involves coupled all parameters, agreeing well experimental simulation results.