12 Rice Kettlebells
Take a vessel and pour some granular material into it, for example, rice. If you dip e.g. a spoon into it, then at a certain depth of immersion, you can lift the vessel and contents by holding the spoon. Explain this phenomenon and explore the relevant parameters of the system.
  •  Vorführexperimente, Videos
  • Flying Circus of Physics: Rice Lifting (Episode 4.4)

    Presentation of the phenomenon.

  • Levitate a bottle of rice with science

    Presentation of phenomenon and short explanation.

  •  Wissenschaftliche Artikel
  • Anomalous density dependence of static friction in sand

    Experimentally measured static friction force on the surface of a glass rod immersed in dry sand and the periodicity of the static friction force during gradual pulling out of the rod. Their observations demonstrate the central role of grain bridges and arches in the macroscopic properties of granular packings.

  • Force chain structure in a rod-withdrawn granular layer

    The force-chain structure in a rod-withdrawn granular layer is experimentally investigated using a photoelastic technique. During the withdrawal, the development process of force chains is visualized by the photoelastic effect.

  • Packing-dependent granular friction exerted on a rod withdrawn from a granular layer: the role of shear jamming

    Resistance force acting on a rod vertically withdrawn from a granular layer is studied by experiments and numerical simulations.

  • The pressure exerted by granular material: an application of the principles of dilatancy

    First description of the phenomenon (1931).