Homogeneous Cooling with Repulsive and Attractive Long-range Interactions

Müller, Micha-Klaus and Luding, Stefan (2009) Homogeneous Cooling with Repulsive and Attractive Long-range Interactions. In: 6th International Conference on Micromechanics of Granular Media, 13-17 July 2009, Golden, CO, USA.

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Abstract:	In granular matter, consisting of discrete particles, long-range interactions imply that each of the particles is interacting with all others. For many charged granular materials with Coulomb repulsion or large-scale gravitationally attractive systems, a Molecular Dynamics environment is developed. In granular systems with long-range interaction forces and dissipative collisions, both effects can lead to large-scale structure formation, whereas already dissipation alone leads to ever growing clusters. For our three-dimensional mono-charged dissipative homogeneous systems we present the effect of both repulsive and attractive mutual long-range forces and make an attempt to predict the collision frequency and the temperature decay in the system by means of a modified pseudo-Liouville operator formalism. The theoretical predictions are in perfect agreement with the simulations, but only in the limit of low density and for not too strong interaction potential enrgy.
Item Type:	Conference or Workshop Item
Copyright:	© 2009 American Institute of Physics
Faculty:	Engineering Technology (CTW)
Research Group:	Engineering Fluid Dynamics (EFD)
Link to this item:	http://purl.utwente.nl/publications/80355
Official URL:	http://link.aip.org/link/doi/10.1063/1.3180022
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