Susumu Goto

Fluid Mechanics Group
Area of Mechanics of Fluids and Thermo-fluids
Division of Nonlinear Mechanics
Department of Mechanical Science and Bioengineering
Graduate School of Engineering Science, Osaka University
1-3 Machikaneyama, Toyonaka, Osaka, 560-8531 Japan

Movies

• Hierarchy of vortices in develped turbulence

  Fully developed turbulence is composed of a hierarchy of multi-scale vortices. The below movie is the visualization of the direct numerical simulation of turbulence in a periodic cube. The Reynolds number is high enough to capture the hierarchy of vortex tubes (different colors correspond to different length scales). Details are given in our paper published in Physical Review Fluids (https://doi.org/10.1103/PhysRevFluids.2.064603).

  https://youtu.be/9p0f2UHt8pM
  

• Turbulence in a precessing sphere

  Developed turbulence can be sustained in a weakly precessing sphere. The below movie shows our laboratory experiment. The cavity of the cylindrical container is precisely spherical. The spherical cavity is filled with water, in which reflective flakes are laden for visualisation. Please have a look at our paper published in Physics of Fluids ( http://dx.doi.org/10.1063/1.4874695), if you are interested in this phenomenon.

  http://youtu.be/JojZON8QlLA
  

 

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