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[Fizinfo] BME Elm. Fiz. Szeminárium, nov. 27, Lévay Sára

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  • From: Janos Asboth <asboth AT>
  • To: fizinfo AT, elmfiz.hallgatok AT, elmfiz.oktatok-kutatok AT
  • Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, nov. 27, Lévay Sára
  • Date: Thu, 26 Nov 2020 11:11:09 +0100


BME Elméleti Fizika Szeminárium,

november 27. péntek 10h15,
online a Microsoft Teams-ben

Lévay Sára (BME Elm. Fiz. tanszék):

Interacting jammed granular systems

Sam Edwards more than 30 years ago proposed a model to describe the
statistics of granular packings by an ensemble of equiprobable jammed
states. Experimental tests of this model remained scarce so far. We
introduce a simple system to analyse statistical properties of jammed
granular ensembles to test Edwards' theory [1]. Identical spheres packed in
a nearly two-dimensional geometrical confinement were studied in
experiments and numerical simulations. When tapped, it evolves towards a
ground state, but due to incompatible domain structures it gets trapped.
Analytical calculations reproduce relatively well our simulation results,
which allows us to test Edwards' theory on a coupled system of two
subsystems with different properties. We find that the joint system can
only be described by a common compactivity if the stress equilibrium is
also taken into account. The results show some counterintuitive effects, as
the side with less free volume compactifies.

[1]: S. Levay et al, arXiv:2007.04789

Minden érdeklődőt szeretettel várunk.

Asbóth János
szemináriumi koordinátor

  • [Fizinfo] BME Elm. Fiz. Szeminárium, nov. 27, Lévay Sára, Janos Asboth, 11/26/2020

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