80 citations · 414 across the 20 of their papers we have counts for
20 papers
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…
A gravity-independent powder-based additive manufacturing process tailored for space applications
Olfa D'Angelo, Felix Kuthe, Szu-Jia Liu +7
The future of space exploration missions will rely on technologies increasing their endurance and self-sufficiency, including for manufacturing objects on-demand. We propose a proc…
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…
Asymptotically Exact Solution of the Fredrickson-Andersen Model
Koray Önder, Matthias Sperl, W. Till Kranz
The Fredrickson-Andersen (FA) model---a kinetically constrained lattice model---displays an ergodic to non-ergodic transition with a slow two-step relaxation of dynamical correlati…
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…
Multicellular self-organization of P. aeruginosa due to interactions with secreted trails
Anatolij Gelimson, Kun Zhao, Calvin K. Lee +3
Guided movement in response to slowly diffusing polymeric trails provides a unique mechanism for self-organization of some microorganisms. To elucidate how this signaling route lea…
Effective dynamics of microorganisms that interact with their own trail
W. Till Kranz, Anatolij Gelimson, Kun Zhao +2
Like ants, some microorganisms are known to leave trails on surfaces to communicate. We explore how trail-mediated self-interaction could affect the behavior of individual microorg…
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…
The Glass Transition in Driven Granular Fluids: A Mode-Coupling Approach
W. T. Kranz, M. Sperl, A. Zippelius
We consider the stationary state of a fluid comprised of inelastic hard spheres or disks under the influence of a random, momentum-conserving external force. Starting from the micr…
Single-Particle Dynamics in Dense Granular Fluids under Driving
Matthias Sperl, Wolf Till Kranz, Annette Zippelius
We present a mode-coupling theory for the dynamics of a tagged particle in a driven granular fluid close to the glass transition. The mean-squared displacement is shown to exhibit…
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…
Correlation of spin and velocity in granular gases
W. T. Kranz, N. V. Brilliantov, T. Poeschel +1
In a granular gas of rough particles the spin of a grain is correlated with its linear velocity. We develop an analytical theory to account for these correlations and compare its p…
Translations and Rotations are correlated in Granular Gases
Nikolai V. Brilliantov, Thorsten Poeschel, W. Till Kranz +1
In a granular gas of rough particles the axis of rotation is shown to be correlated with the translational velocity of the particles. The average relative orientation of angular an…