Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Kadau, Dirk"'
Autor:
Vetter, Roman, Sigg, Stephan, Singer, Herman M., Kadau, Dirk, Herrmann, Hans J., Schneebeli, Martin
Publikováno v:
EPL 89 (2010) 26001
A Monte Carlo algorithm to simulate the isothermal recrystallization process of snow is presented. The snow metamorphism is approximated by two mass redistribution processes, surface diffusion and sublimation-deposition. The algorithm is justified an
Externí odkaz:
http://arxiv.org/abs/2007.15379
Autor:
Mani, Roman, Semprebon, Ciro, Kadau, Dirk, Herrmann, Hans J., Brinkmann, Martin, Herminghaus, Stephan
Publikováno v:
Physical Review E 91, 042204, (2015)
The stability of sand castles is determined by the structure of wet granulates. Experimental data about the size distribution of fluid pockets are ambiguous about their origin. We discovered that contact angle hysteresis plays a fundamental role in t
Externí odkaz:
http://arxiv.org/abs/1508.01426
Autor:
Fernandez, Nicolas, Mani, Roman, Rinaldi, David, Kadau, Dirk, Mosquet, Martin, Lombois-Burger, Helene, Cayer-Barrioz, Juliette, Herrmann, Hans J., Spencer, Nicholas D., Isa, Lucio
We propose a simple model, supported by contact-dynamics simulations as well as rheology and friction measurements, that links the transition from continuous to discontinuous shear-thickening in dense granular pastes to distinct lubrication regimes i
Externí odkaz:
http://arxiv.org/abs/1308.1002
We show how liquid migrates in sheared unsaturated granular media using a grain scale model for capillary bridges. Liquid is redistributed to neighboring contacts after rupture of individual capillary bridges leading to redistribution of liquid on la
Externí odkaz:
http://arxiv.org/abs/1206.5638
Publikováno v:
Physical Review E 86, 046308 (2012)
In this paper we present a new model for modeling the diffusion and relative dispersion of particles in homogeneous isotropic turbulence. We use an Heisenberg-like Hamiltonian to incorporate spatial correlations between fluid particles, which are mod
Externí odkaz:
http://arxiv.org/abs/1205.6297
How does pore liquid reconfigure within shear bands in wet granular media? Conventional wisdom predicts that liquid is drawn into dilating granular media. We, however, find a depletion of liquid in shear bands despite increased porosity due to dilata
Externí odkaz:
http://arxiv.org/abs/1205.0999
Publikováno v:
Physical Review E 86, 036321 (2012)
In this paper we numerically investigate the influence of dissipation during particle collisions in an homogeneous turbulent velocity field by coupling a discrete element method to a Lattice-Boltzmann simulation with spectral forcing. We show that ev
Externí odkaz:
http://arxiv.org/abs/1204.4985
Publikováno v:
Granular Matter 13(3), 219-223 (2011)
The discrete element method constitutes a general class of modeling techniques to simulate the microscopic behavior (i.e. at the particle scale) of granular/soil materials. We present a contact dynamics method, accounting for the cohesive nature of f
Externí odkaz:
http://arxiv.org/abs/1012.2696
Publikováno v:
Physical Review E 83, 066301 (2011)
We combine a DEM simulation with a stochastic process to model the movement of spherical particles in a turbulent channel flow. With this model we investigate the mixing properties of two species of particles flowing through the channel. We find a li
Externí odkaz:
http://arxiv.org/abs/1011.6585
Autor:
Kadau, Dirk, Herrmann, Hans J.
Publikováno v:
Physical Review E 83, 031301 (2011)
Loose granular structures stabilized against gravity by an effective cohesive force are investigated on a microscopic basis using contact dynamics. We study the influence of the granular Bond number on the density profiles and the generation process
Externí odkaz:
http://arxiv.org/abs/1010.5339