ELFT HÍRADÓ

[Janos Asboth <asboth AT phy.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

november 27. péntek 10h15,
online a Microsoft Teams-ben
<https://teams.microsoft.com/dl/launcher/launcher.html?url=%2F_%23%2Fl%2Fmeetup-join%2F19%3A2b2c8bd5ca294c90a1320cb5d16f7925%40thread.tacv2%2F1603102316945%3Fcontext%3D%257b%2522Tid%2522%253a%25226a3548ab-7570-4271-91a8-58da00697029%2522%252c%2522Oid%2522%253a%2522c7eaf7d2-684b-4597-b217-6a9121400219%2522%257d%26anon%3Dtrue&type=meetup-join&deeplinkId=dd60dca9-b84b-4b31-b6a0-6b09aedd2004&directDl=true&msLaunch=true&enableMobilePage=true&suppressPrompt=true>

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