Sharma, P K
(2015)
Analysis of Drop Bouncing on Solid Hydrophobic Surface.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
People are doing this problem from years because it has complex phenomenon such as con-tact line, spreading, splashing, re-bouncing to understand. Difficulty of problem increased by not having good contact angle models in numeric. Impact of drop on hydrophobic surface with static contact angle was studied using Gerris. ”Volume of fraction” method is used to track the interface between two fluids in Gerris. Moto of this thesis to present numerical simulation work on drop bouncing, so our zone is hydrophobic substrate. Coefficient of restitution in problem shows the loss of energy in drop. Bouncing drop loses its kinetics energy and stretched to maximum radius at points kinetics energy equals zero, and surface tension effect act as spring in the system which store energy and force the drop to bounce back. Gravitational forces are less, and capillary wave form at the surface of drop. Capillary oscillation of the drop dies due to viscosity present in drop fluid.
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