Thu February 17th 2011
Journal Club The “Hammer Drop”
Tuan Tran


Tuan will tell us about a recently found mechanism for wetting transition: When a pendant drop settles upon deposition, there is a virtual ‘‘collision’’ where its center of gravity undergoes rapid deceleration. This induces a high water hammer-type pressure that causes wetting transition. Both large and small droplets can transition to wetted states due to the new deceleration driven and the previously known Laplace mechanisms, respectively. It is explained how the attainment of a nonwetted Cassie-Baxter state is more restrictive than previously known.

“Rapid Deceleration-Driven Wetting Transition during Pendant Drop Deposition on Superhydrophobic Surfaces”, Hyuk-Min Kwon, Adam T. Paxson, Kripa K. Varanasi and Neelesh A. Patankar. Physical Review Letters, 106, 036102 (2011).
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The 10th Complex Motion in Fluids 2021
Max Planck Gesellschaft
Centre for Scientific Computing