Now showing items 1-20 of 80

    • 3D simulations of self-propelled, reconstructed jellyfish using vortex methods 

      Rasmussen, Johannes Tophøj; Rosinelli, Diego; Storti, Francesca; Koumoutsakos, Petros; Walther, Jens Honore (2009-10-16)
      We present simulations of the vortex dynamics associated with the self-propelled motion of jellyfish. The geometry is obtained from image segmentation of video recordings from live jellyfish. The numerical simulations are ...
    • Animations from PDF Model Calculations of a Lifted Hydrogen Flame 

      Wang, Haifeng; Pope, Stephen B. (2007-09-03)
    • antibubbles in a cyclone eyewall 

      terwagne, denis (2009-10-13)
      A negative bubble, coined antibubble, is composed by a thin air shell that is immersed in a soapy mixture. A large vortex is generated in the liquid using a mixer. An antibubble is then created close to the surface. ...
    • Bio-Inspired Hierarchical Superhydrophobic Surfaces Resist Water Droplet Impact 

      Varanasi, Kripa; Hsu, Ming; Bhate, Nitin; Keimel, Chris; Deng, Tao (2008-10-10)
      We present fluid dynamic videos of droplet impact on three types of superhydrophobic surfaces to explicitly show the effect of surface texture on droplet impact resistance and recoil efficacy. We predict that droplets ...
    • Bio-Inspired Hierarchical Superhydrophobic Surfaces Resist Water Droplet Impact 

      Varanasi, Kripa; Hsu, Ming; Bhate, Nitin; Keimel, Chris; Deng, Tao (2008-10-10)
      We present fluid dynamic videos of droplet impact on three types of superhydrophobic surfaces to explicitly show the effect of surface texture on droplet impact resistance and recoil efficacy. We predict that droplets ...
    • The bounce-splash of a viscoelastic drop 

      Hernandez-Sanchez, Federico; Rene, Ledesma; Roberto, Zenit (2008-10-09)
      This is an entry for the Gallery of Fluid Motion of the 61st Annual Meeting of the APS-DFD ( fluid dynamics videos ). This video shows the collision and rebound of viscoelastic drops against a solid wall. Using a high ...
    • The bounce-splash of a viscoelastic drop (low resolution video) 

      Hernandez-Sanchez, Federico; Rene, Ledesma; Roberto, Zenit (2008-10-10)
      This is an entry for the Gallery of Fluid Motion of the 61st Annual Meeting of the APS-DFD ( fluid dynamics videos ). This video shows the collision and rebound of viscoelastic drops against a solid wall. Using a high ...
    • Bouncing of a Droplet on Superhydrophobic Surface in AC Electrowetting 

      Lee, Seung Jun; Lee, Sanghyun; Kang, Kwan Hyoung (2009-10-16)
      The movie shows a droplet jumping from the superhydrophobic surface under an alternating electrical actuation close to the resonance of the droplet vibration, which enables a sessile droplet to accumulate sufficient energy ...
    • Cellular Blood Flow 

      Clausen, Jonathan; Reasor, Daniel Jr; Aidun, Cyrus (2009-10-16)
      The fluid dynamics video that is presented here outlines recent advances in the simulation of multiphase cellular blood flow through the direct numerical simulations of deformable red blood cells (RBCs) demonstrated through ...
    • Collapse of Non-axisymmetric Cavities 

      Enriquez, Oscar R.; Peters, Ivo R.; Gekle, Stephan; Schmidt, Laura; Versluis, Michel; van der Meer, Devaraj; Lohse, Detlef (2009-10-14)
      A round disk with a harmonic disturbance impacts on a water surface and creates a non-axisymmetric cavity which collapses under the influence of hydrostatic pressure. We use disks deformed with mode m=2 to m=6. For all ...
    • Computation of Helicopter Flow with Sand Pick-up 

      Wenren, Yonghu; John, Steinhoff; Subhashini, Chitta; Jan, Walter (AIAA, 2006-01)
      Accurate prediction of rotorcraft flow fields for brownout, computed using an incompressible flow solver SAGE with Vorticity Confinement, is demonstrated in our fluid dynamics video. The main problem addressed here is the ...
    • Crawling & Swimming of Nematodes in Complex Fluids 

      Sznitman, Josue; Lu, Kevin; Arratia, Paulo (2008-10-10)
      C. elegans is a small (~ 1mm long), free-living nematode that is extensively used as a model organism for biological research, including genomics, cell biology, and neuroscience. In this video, we show how C. elegans adapts ...
    • Crawling & Swimming of Nematodes in Complex Fluids 

      Sznitman, Josue; Lu, Kevin; Arratia, Paulo (2008-10-10)
      C. elegans is a small (~ 1mm long), free-living nematode that is extensively used as a model organism for biological research, including genomics, cell biology, and neuroscience. In this video, we show how C. elegans adapts ...
    • Drop Behavior in Uniform DC Electric Field 

      Salipante, Paul F.; Vlahovska, Petia M. (2009-10-16)
      Drop deformation in uniform electric fields is a classic problem. The pioneering work of G.I.Taylor demonstrated that for weakly conducting media, the drop fluid undergoes a toroidal flow and the drop adopts a prolate or ...
    • 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 ...
    • Dynamic States in Cellular Flames 

      Gorman, Michael (2009-10-08)
      Dynamic States in Cellular Flames, Michael Gorman, University of Houston. A premixed flame on a circular porous plug burner appears a thin (0.5 mm) luminous disk. Premixed flames are distinctive as a dynamical system ...
    • Dynamics of Water Entry 

      Truscott, Tadd T.; Aristoff, Jeffrey M.; Techet, Alexandra H. (2008-10-10)
      The hydrodynamics associated with water-entry of spheres can be highly variable with respect to the material and kinematic properties of the sphere. This series of five fluid dynamics videos illustrates several subtle ...
    • Electroworming : The behaviors of Caenorhabditis (C.) elegans in DC and AC electric fields 

      Chuang, Han-Sheng; Raizen, David; Dabbish, Nooreen; Bau, Haim (2010-10-15)
      The video showcases how C. elegans worms respond to DC and AC electrical stimulations. Gabel et al (2007) demonstrated that in the presence of DC and low frequency AC fields, worms of stage L2 and larger propel themselves ...
    • Falling Flexible Sheets 

      Alben, Silas (2010-08-04)
      We present a fluid dynamics video showing simulations of flexible bodies falling in an inviscid fluid. Vortex sheets are shed from the trailing edges of the bodies according to the Kutta condition. The basic behavior is ...
    • Falling Jets of Particles in Viscous Fluids 

      Pignatel, Florent; Nicolas, Maxime; Guazzelli, Elisabeth; Saintillan, David (2008-10-09)
      Falling jets of particles at low Reynolds number in viscous fluids exhibit instabilities. This fluid dynamics video shows experiments and numerical simulations of this phenomenon.