Now showing items 21-30 of 129

    • Droplet bouncing and skipping on microstructured hydrophobic surfaces 

      Saksena, Rajat; Cannon, Andrew; Barros Jr., Julio Manuel; King, William Paul; Christensen, Kenneth T. (2009-10-16)
      The impact of a jet of droplets upon surfaces of varying hydrophobicity is studied via high-speed imaging. Microstructures on silicone surfaces consisting of cylindrical pillars of varying sizes and spacings are utilized ...
    • Large-eddy simulations of Richtmyer-Meshkov instability in a converging geometry 

      Lombardini, Manuel; Deiterding, Ralf (2009-10-17)
      The Richtmyer-Meshkov instability (RMI) refers to the baroclinic generation of vorticity at a perturbed density interface when impacted by a shock wave. It is often thought of as the impulsive limit of the Rayleigh-Taylor ...
    • Convection rolls in a rotating box filled with beads 

      Rietz, Frank; Stannarius, Ralf (2009-10-17)
      Fill a box partially with a dry mixture of beads and rotate it slowly. As it is known from granular physics segregation patterns appear. Now put in more beads so that the box is almost completely filled and the beads can't ...
    • Sand swimming lizard: sandfish 

      Maladen, Ryan D.; Ding, Yang; Kamor, Adam; Goldman, Daniel I. (2009-10-16)
      We use high-speed x-ray imaging to reveal how a small (~10cm) desert dwelling lizard, the sandfish (Scincus scincus), swims within a granular medium [1]. On the surface, the lizard uses a standard diagonal gait, but once ...
    • Light Enabled Droplet Manipulations 

      Chuang, Han-Sheng; Kumar, Aloke; Wereley, Steven (2009-10-16)
      This fluid dynamics video showcases how optically induced electrowetting can be used to manipulate liquid droplets in open space and particulate phases inside the droplet. A photoconductive layer is added to a conventional ...
    • Summoning the wind: Hydrodynamic cooperation of forcibly launched fungal spores 

      Roper, Marcus; Seminara, Agnese; Cobb, Ann; Dillard, Helene; Pringle, Anne (2009-10-16)
      The forcibly launched spores of the crop pathogen \emph{Sclerotinia sclerotiorum} must eject through many centimeters of nearly still air to reach the flowers of the plants that the fungus infects. Because of their microscopic ...
    • Vortex shedding and hovering of a rigid body in an oscillating flow 

      Liu, Bin; Weathers, Annie; Childress, Stephen; Zhang, Jun (2009-10-16)
      The fluid dynamics video shows rigid, spatially asymmetric bodies interacting with oscillating background flows. A free rigid object, here a hollow "pyramid," can hover quite stably against gravity in the oscillating ...
    • Light Enabled Droplet Manipulations 

      Han-Sheng, Chuang; Aloke, Kumar; Steven, Wereley (2009-10-16)
      This fluid dynamics video showcases how optically induced electrowetting can be used to manipulate liquid droplets in open space. A photoconductive layer is added to a conventional electrowetting-on-dielectric (EWOD) ...
    • Sand swimming lizard: sandfish 

      Maladen, Ryan D.; Ding, Yang; Kamor, Adam; Goldman, Daniel I. (2009-10-16)
      We use high-speed x-ray imaging to reveal how a small (~10cm) desert dwelling lizard, the sandfish (Scincus scincus), swims within a granular medium [1]. On the surface, the lizard uses a standard diagonal gait, but once ...
    • Spreading Water on Teflon: Marangoni Influences and the Elimination of the Ring Stain 

      Rendall, Clint; Majumder, Mainak; Pasquali, Matteo (2009-10-16)
      In this video, a new technique of spreading water on the hydrophobic surface Teflon® is presented. Under ambient conditions, a small droplet of water placed on a Teflon® surface will form a bead with a very high contact ...