Granular Flows
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Clogging of a hopper: [8MB] [G. Kohring, H. Puhl, H. J. Tillemans, S. Melin, W. Vermöhlen] Clogging of a hopper in 2d filled with rectangular particles due to a fluctuation in the influx. This is an industrially designed setup. |
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Flow through a hopper: [6-7MB] [G. Ristow] Discs of different size flow out of a hopper. Experiment - Simulation 1 - Simulation 2 - Simulation 3 - Simulation 4 |
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Spontaneous formation of clogs
in pipeflow: [5-8MB] [Th. Pöschel] Pipe cut in 3 pieces (having periodic boundary conditions and rough walls) through which monodisperse particles flow from left to right under a bulk force (e. g. gravitation). Simulation 1 - Simulation 2 Experiment - Simulation 3 - Simulation 4 - Simulation 5 |
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Flow on a chute: [2-10MB] [Th. Pöschel] Particles of equal size flowing down a bumpy chute. Experiment - Simulation 1 - Simulation 2 |
Vibration
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Vibrating plate: [38MB] [B. Wachmann] Elastic particles jumping on a vibrating plate. (The camera is mounted on one particle and directed to the center of the cell.) |
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Vibrating plate: [4-7MB] [H. J. Herrmann] Spherical particles on a horizontally vibrating plate with periodic boundary conditions from left to right. Experiment - Simulation 1 - Simulation 2 - Simulation 3 - Simulation 4 |
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Vibrating plate - convection: [7-9MB] [H. J. Herrmann] Particles vibrating in a horizontally shaken box. One observes at each wall a convection roll. Experiment - Simulation 1 - Simulation 2 |
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Brazil nut effect: [10-13MB] [H. J. Herrmann] Brazil nut effect in 2d: A big red particle submerged within smaller particles rises to the top when the repository is shaken. Experiment - Simulation 1 - Simulation 2 |
Shearing
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Rotating drum: [4-16MB] [V. Buchholtz, Th. Pöschel] Particles moving in a rotating drum. Simualtion 1 - Simualtion 2 - Simualtion 3 - Simualtion 4 - Simualtion 5 - Simualtion 6 - Simualtion 7 - Simualtion 8 - Simualtion 9 - Simualtion 10 - Simualtion 11 |
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Rotating shear cell: [8MB] [S. Schöllmann, S. Luding] Force network in a 2d rotating shear cell filled with about 3000 circular discs with two different sizes. |
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Rotating shear cell: [72K] [M. Lätzel] Simualtion 1 |
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Earthquakes: [3MB] [H. J. Tillemans] 2d shear cell filled with polygons giving "earthquakes". |
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Evolution of shear bands: [3MB] [A. Poliakov] Evolution of shear bands in a slowly deformed 2d Mohr-Coulomb material. |
Gases
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Two-species diffusion: [12MB] [M. Müller] Diffusion of two species of gas particles with different masses. |
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Cooling of a dissipative gas: [2-10MB] [S. Luding, M. Müller] 2d simulation with periodic boundary conditions. The system cools due to dissipation so that 10% of the relative velocity is lost per collision. ED simulation (10^5 particles) - kinetic energy - collsion rate - initial position DSMC simulation (10^6 particles) |
Astrophysics
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Planetary Ring-System: [2MB] [M.-K. Müller] An odyssey through the plane of a planetary ring-system. |
Particles in Fluids and Gases
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Sedimentation: [12MB] [B. Wachmann] Sedimentation of spheres in a fluid. (The camera is mounted on one particle and directed to the center of the cell.) |
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Sedimentation: [10-54MB] [K. Höfler] Comparison of a sedimentation experiment with simulation. Part of the movie |
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Rayleigh-Taylor
instability: [24MB] [S. Schwarzer] Rayleigh-Taylor instability in sedimentation. |
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Aggregation of particles: [21MB] [S. Schwarzer] Aggregation of particles in a sheared 2d fluid. |
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Dynamics of polymers: [6.8MB] [Thomas Ihle & Vasanthi R. Iyengar] Three fibers deformed by three motor-complexes in a viscous fluid. |
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Falling Sphere: 3 pt [130KB] 5 pt [184KB] [Martin Strauß] Falling spheres at Re = 20 simulated by Stochastic Rotation Dynamics (Malevanets-Kapral method). |
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Fluctuating fiber: [45MB] [Thomas Ihle & Vasanthi R. Iyengar] A semi-flexible fiber in a fluctuating fluid calculated by the Stochastic Rotation Dynamics (Malevanets-Kapral method). |
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Falling oblate ellipsoid: [930KB] [Frank Fonseca] Sedimentation of an oblate ellipsoid. |
Membranes
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Membrane: [9MB] [S. Luding] A film of an ED simulation of membrane dynamics. The membrane contains 9000 spheres which are connected by strings. |
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Tethered membranes: [1-3MB] [S. Miller] ED simulations of tethered membranes. Membrane - hexagon Gas-filled spherical membrane in a gravitational field 2 membranes in shear flow |
Porous Media
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Mixing in fractured network: [0.3MB] [M. Madadi] Mixing of two miscible fluids, in a network of fractures. Each fracture is a 2D channel with rough and self-affine surfaces. |
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Der Stein: [8MB] [Ch. Manwart] Flight through a sandstone. |