80 citations · 414 across the 20 of their papers we have counts for
12 papers · 1 filter
Time-state superposition in non-equilibrium fluidized granular matter
Marlo Kunzner, W. Till Kranz, Matthias Sperl +1
Despite being intrinsically athermal and strongly driven, granular materials can exhibit remarkably glass-like dynamics. Whether their rheology can be described by the same scaling…
Rheological regimes in agitated granular media under shear
Olfa D'Angelo, Matthias Sperl, W. Till Kranz
Agitated granular media have a rich rheology: they exhibit Newtonian behavior at low shear rate and density, develop a yield stress at high density, and cross over to Bagnoldian sh…
The manifold rheology of fluidized granular media
Olfa D'Angelo, Abhishek Shetty, Matthias Sperl +1
Fluidized granular media have a rich rheology: measuring shear stress as a function of shear rate , they exhibit Newtonian behavior for low densities and sh…
Comment on "Explicit Analytical Solution for Random Close Packing in and "
W. Till Kranz
I comment on Zaccone, Phys. Rev. Lett. {\bf 128}, 028002 (2022) highlighting a flaw in the derivation that led to a spurious divergent factor. This renders the derivation of the ra…
Granular piston-probing in microgravity: powder compression, from densification to jamming
Olfa D'Angelo, Anabelle Horb, Aidan Cowley +2
The macroscopic response of granular solids is determined by the microscopic fabric of force chains, which, in turn, is intimately linked to the history of the solid. To query the…
Granular rheology: a tale of three time scales
Olivier Coquand, Wolf Till Kranz, Matthias Sperl
We adapt statistical models of the physics of complex fluids to study the rheology of granular liquids. This allows us to provide laws of granular rheology based on first principle…
Kinetic theory for strong uniform shear flow of granular media at high density
W. Till Kranz, Matthias Sperl
We discuss the uniform shear flow of a fluidized granular bed composed of monodisperse Hertzian spheres. Considering high densities around the glass transition density of inelastic…
Integration through transients for inelastic hard sphere fluids
W. Till Kranz, Fabian Frahsa, Annette Zippelius +2
We compute the rheological properties of inelastic hard spheres in steady shear flow for general shear rates and densities. Starting from the microscopic dynamics we generalise the…
Rheology of inelastic hard spheres at finite density and shear rate
W. Till Kranz, Fabian Frahsa, Annette Zippelius +2
Considering a granular fluid of inelastic smooth hard spheres we discuss the conditions delineating the rheological regimes comprising Newtonian, Bagnoldian, shear thinning, and sh…
A classical long-time tail in a driven granular fluid
W. Till Kranz
I derive a mode-coupling theory for the velocity autocorrelation function, ψ(t), in a fluid of randomly driven inelastic hard spheres far from equilibrium. With this, I confirm a c…
Glass Transition for Driven Granular Fluids
W. Till Kranz, Matthias Sperl, Annette Zippelius
We investigate the dynamics of a driven system of dissipative hard spheres in the framework of mode-coupling theory. The dissipation is modeled by normal restitution, and driving i…
Partitioning of energy in highly polydisperse granular gases
Hildegard Uecker, W. Till Kranz, Timo Aspelmeier +1
A highly polydisperse granular gas is modeled by a continuous distribution of particle sizes, a, giving rise to a corresponding continuous temperature profile, T(a), which we compu…