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pro vyhledávání: '"Kranz, W. Till"'
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 shear thickening when sheared rapidly -- making them challenging to enco
Externí odkaz:
http://arxiv.org/abs/2409.01297
Fluidized granular media have a rich rheology: measuring shear stress $\sigma$ as a function of shear rate $\dot\gamma$, they exhibit Newtonian behavior $\sigma\sim\dot\gamma$ for low densities and shear rates, develop a yield stress for intermediate
Externí odkaz:
http://arxiv.org/abs/2309.00413
Autor:
Kranz, W. Till
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 random close packing density invalid.
Comment: Slightly cleaned up
Comment: Slightly cleaned up
Externí odkaz:
http://arxiv.org/abs/2204.13901
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 influence of gravity on powder flow-behavior, a granular material is s
Externí odkaz:
http://arxiv.org/abs/2202.10792
Autor:
D'Angelo, Olfa, Kuthe, Felix, Liu, Szu-Jia, Wiedey, Raphael, Bennett, Joe M., Meisnar, Martina, Barnes, Andrew, Kranz, W. Till, Voigtmann, Thomas, Meyer, Andreas
Publikováno v:
Additive Manufacturing Additive Manufacturing 47 (2021) 102349
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 process for handling and additively manufacturing powders that functions i
Externí odkaz:
http://arxiv.org/abs/2102.09815
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 correlation functions close to the transition point. We derive an asymptoticall
Externí odkaz:
http://arxiv.org/abs/1902.06537
Autor:
Kranz, W. Till, Golestanian, Ramin
Publikováno v:
J. Chem. Phys. 150, 214111 (2019)
A number of microorganisms leave persistent trails while moving along surfaces. For single-cell organisms, the trail-mediated self-interaction will influence its dynamics. It has been discussed recently [Kranz \textit{et al.} Phys. Rev. Lett. \textbf
Externí odkaz:
http://arxiv.org/abs/1811.05805
Autor:
Kranz, W. Till, Sperl, Matthias
Publikováno v:
EPJ Web of Conferences 140, 03064 (2017)
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 Hertzian spheres, we report kinetic theory expressions for the Newton
Externí odkaz:
http://arxiv.org/abs/1710.04480
Publikováno v:
Phys. Rev. Lett. 121, 148002 (2018)
Considering a granular fluid of inelastic smooth hard spheres we discuss the conditions delineating the rheological regimes comprising Newtonian, Bagnoldian, shear thinning, and shear thickening behavior. Developing a kinetic theory, valid at finite
Externí odkaz:
http://arxiv.org/abs/1710.04452
Publikováno v:
Phys. Rev. Fluids 5, 024305 (2020)
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 Integration Through Transients (\textsc{itt}) formalism to a fluid of
Externí odkaz:
http://arxiv.org/abs/1710.04475