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Effects Of Roughness On Droplet Apparent Contact Angles On A Fiber, M. M. Amrei, M. Davoudi, G. G. Chase, H. Vahedi Tafreshi

Mechanical and Nuclear Engineering Publications

This paper reports on our investigation of the effects of surface roughness on the equilibrium shape and apparent contact angles of a droplet deposited on a fiber. In particular, the shape of a droplet on a roughened fiber is studied via the energy minimization method implemented in the surface evolver finite element code. Sinusoidal roughness varying in both the longitudinal and radial directions is considered in the simulations to study the effects of surface roughness on the most stable shape of a droplet on a fiber (corresponding a global minimum energy state). It is found that surface roughness delays droplet …