Now showing items 1-20 of 129

    • Numerical simulation of transom-stern waves 

      Hand, Randall E.; Valenciano, Miguel; George, Kevin; Biddlecome, Tom; Walters, Richard; Stephens, Mike; O'Shea, Thomas T.; Brucker, Kyle A.; Dommermuth, Douglas G. (APS DFD Gallery of Fluid Motion, 2010-11-23)
      The flow field generated by a transom stern hullform is a complex, broad-banded, three-dimensional system marked by a large breaking wave. This unsteady multiphase turbulent flow feature is difficult to study ...
    • 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 ...
    • A Numerical Simulation of a Plunging Breaking Wave 

      Adams, Paul; George, Kevin; Stephens, Mike; Dommermuth, Douglas; Brucker, Kyle; O'Shea, Thomas (2009-11-22)
      This fluid dynamics video was submitted to the gallery of fluid motion at the 2009 APS/DFD conference. The video shows the results of a of numerical simulation of a deep water plunging breaking wave. The two-phase calculation ...
    • Nonlinear spin-up of a thermally stratified fluid in cylindrical geometries 

      Pacheco, J. Rafael; Smirnov, Sergey A.; Verzicco, Roberto (2009-10-26)
      This is an entry for the Gallery of Fluid Motion of the 62nd Annual Meeting of the APS-DFD (fluid dynamics videos). This video shows the three-dimensional time-dependent incremental spin-up of a thermally stratified fluid ...
    • Nonlinear spin-up of a thermally stratified fluid in cylindrical geometries 

      Pacheco, J. Rafael; Smirnov, Sergey A.; Verzicco, Roberto (2009-10-25)
      This is an entry for the Gallery of Fluid Motion of the 62nd Annual Meeting of the APS-DFD (fluid dynamics videos). This video shows the three-dimensional time-de\-pen\-dent incremental spin-up of a thermally stratified ...
    • Primary Atomization of a Liquid Jet in Crossflow 

      Rana, Sandeep; Herrmann, Marcus (2009-10-23)
      We present a visualization of the primary atomization of a turbulent liquid jet injected into a turbulent gaseous cross-stream. Detailed numerical simulation results were obtained using the Refined Level Set Grid (RLSG) ...
    • Hydrothermal waves in evaporating sessile drops (APS 2009) 

      BRUTIN, David; RIGOLLET, Fabrice; LE NILIOT, Christophe (2009-10-23)
      This fluid dynamics video was submitted to the Gallery of Fluid Motion for the 2009 APS Division of Fluid Dynamics Meeting in Minneapolis, Minnesota. Drop evaporation is a simple phenomena but still unclear concerning the ...
    • Infrared video of a warm water surface in the presence and absence of surfactant monolayers 

      Bower, S. M.; Saylor, J. R. (2009-10-19)
      Infrared (IR) videos are presented which show a warm water surface undergoing convective processes. These fluid dynamics videos show the water surface with: 1) no surfactant monolayer material present, 2) a liquid-phase ...
    • Geometry of elastic hydrofracturing by injection of an over pressured non-Newtonian Fluid 

      J Chavez-Alvarez, E Soto; B Barrientos, C Mares; M Cerca (2009-10-19)
      The nucleation and propagation of hydrofractures by injection of over pressured fluids in an elastic and isotropic medium are studied experimentally. Non-Newtonian fluids are injected inside a gelatine whose mechanical ...
    • Three-dimensional pattern formation in suspensions of swimming micro-organisms 

      Pahlavan, Amir Alizadeh; Saintillan, David (2009-10-19)
      Suspensions of self-propelled particles, such as swimming micro-organisms, are known to undergo complex dynamics as a result of hydrodynamic interactions. This fluid dynamics video presents a numerical simulation of such ...
    • Nanodroplet Impact on a Solid Platinum Surface: Spreading and Bouncing 

      Lussier, Daniel T; Ventikos, Yiannis (2009-10-17)
      Hi-resolution and low-resolution versions of video for Gallery of Fluid Motion submission. Video contains molecular dynamics simulation of argon nanodroplet impacting onto a platinum given varying droplet speed and surface ...
    • Slow dynamics of phospholipid monolayers at the air/water interface 

      Choi, Siyoung; Squires, Todd (2009-10-17)
    • Slow dynamics of phospholipid monolayers at the air/water interface 

      Choi, Siyoung; Squires, Todd (2009-10-17)
    • New (Internal) Wave Generation - Laboratory Experiments 

      Mathur, Manikandan; Mercier, Matthieu; Dauxois, Thierry; Peacock, Thomas (2009-10-17)
      In this video, we demonstrate the generation of internal waves using a novel wave generator. Specifically, uni-directional internal wave beams and vertical modes are generated and visualized in laboratory experiments.
    • Dynamically forced cells of a viscoelastic fluid over an array of rollers 

      Liu, Bin; Zhang, Jun; Shelley, Michael (2009-10-17)
      Our fluid dynamics video shows the response of a layer of viscoelastic fluid to an array of four-roll mills steadily rotating underneath. When the relaxation time of the fluid is sufficiently long, the fluid divides into ...
    • 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 ...