FINITE ELEMENT MODELING OF DROPLET IMPACT ON SURFACES WITH DIFFERENT WETTABILITY AND MORPHOLOGY

Dimitrios SKONDRAS-GIOUSIOS, Marina GOUNARI, Maria BALANOU, Angelos P. MARKOPOULOS

Abstract


The manipulation of droplet impact on manufactured surfaces is of great importance for surface engineering applications related with anti-corrosion, self-cleaning, heat exchange and anti-icing properties. In this work, finite element analysis was utilized for creating computational models for studying the influence that different dynamic wetting states, surface morphologies and droplet velocities had on the droplet impact on the surface. A laminar two-phase flow model coupled with phase field or level set method was employed for capturing the droplet movement, using adaptive mesh refinement. The results showed that surface hydrophobicity/philicity as well as morphology have a significant influence on non-dimensional parameters such as spreading factor and apex height of the droplet as well as on breakage or bouncing of the droplet.


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