KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Clean Combustion Research Center
Mechanical Engineering Program
High-Speed Fluids Imaging Laboratory
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AbstractIn this work we show that when a liquid drop impacts onto a fine-grained hydrophobic powder, the final form of the drop can be very different from the spherical form with which it impacts. In all cases, the drop rebounds due to the hydrophobic nature of the powder. However, we find that above a critical impact speed, the drop undergoes a permanent deformation to a highly non-spherical shape with a near-complete coverage of powder, which then freezes the drop oscillations during rebound. © 2012 Elsevier B.V.
SponsorsThis work was partially supported by an Academic Excellence Alliance grant (7000000028) awarded by the KAUST Office of Competitive Research Funds.