Now showing items 1-20 of 129

    • 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 ...
    • 3D vortex formation of rigid and flexible plates in impulsively starting motion 

      Kim, Daegyoum; Gharib, Morteza (2008-10-10)
      Three-dimensional vortex formation process for plates in impulsive motion is investigated experimentally by using defocusing digital particle image velocimetry (DDPIV). Rigid and flexible plate cases are compared in order ...
    • The amazing bouncing droplet 

      Terwagne, Denis; Dorbolo, Stephane; Vandewalle, Nicolas; Gilet, Tristan (2008-10-06)
      When a low viscosity oil droplet is laid on the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescencing. The coalescence can be delayed and sometimes inhibited by injecting fresh air under ...
    • Animation of a scatter plot in a lifted hydrogen jet flame accoring to the modified Curl mixing model 

      Wang, Haifeng; Pope, Stephen B. (2007-11-01)
      Animation of the scatter plot of temperature against mixture fraction for a lifted hydrogen jet flame. The calculations are based on the joint PDF method using the modifed Curl mixing model.
    • Animations from PDF Model Calculations of a Lifted Hydrogen Flame 

      Wang, Haifeng; Pope, Stephen B. (2007-09-03)
    • Animations of hydrogen lifted flames: particles from the fuel stream 

      Wang, Haifeng; Pope, Stephen B. (2007-09-06)
      The three MPEG files are animations of particle trajectories in a hydrogen lifted flame. The particles originate from the fuel stream.
    • 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. ...
    • Apex Jets from Impacting Drops 

      Marston, Jeremy; Thorrodsen, Siggi (2008-10-13)
      When a viscous drop impacts onto a pool of lower viscosity liquid, a new jetting phenomenon is observed; an Apex Jet. This jet is produced by the ejecta sheet which emerges from the free surface of the pool, moves up ...
    • Atoms in the Surf 

      Richards, D.F.; Krauss, L.D.; Cabot, W.H.; Caspersen, K.J.; Cook, A.W.; Glosli, J.N.; Rudd, R.E.; Streitz, F.H. (2008-10-16)
      We present a fluid dynamics video showing the results of a 9-billion atom molecular dynamics simulation of complex fluid flow in molten copper and aluminum. Starting with an atomically flat interface, a shear is imposed ...
    • 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 blistering of a viscoelastic filament of a droplet of saliva 

      Wagner, Christian; Eggers, Jens; Sattler, Rainer (2009-09-15)
      A fluid dynamics video of the break up of a droplet of saliva is shown. First a viscoelastic filament is formed and than the blistering of this filament is shown. Finally, a flow induced phase separation takes place nanometer ...
    • 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 ...
    • The Clapping Book 

      Reis, Pedro; Bush, John (2008-10-09)
      A steady horizontal air stream flows across a book [1,2] clamped at its downstream end. Pages lift off to form a growing bent stack whose shape is determined by the torques associated with aerodynamic forces, weight and ...
    • 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 ...
    • Collision of a sphere onto a wall coated with a liquid film 

      Ardekani, Arezoo; Rangel, Roger (2008-09-22)
      Particle-particle and particle-wall collisions occur in many natural and industrial applications such as sedimentation, agglomeration, and granular flows. To accurately predict the behavior of particulate flows, fundamental ...
    • 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 ...