TY - GEN
T1 - Energy transport through dense granular matter
AU - Kondic, L.
AU - Fang, X.
AU - Dybenko, O. M.
AU - Behringer, R. P.
PY - 2009
Y1 - 2009
N2 - In order to probe the process of energy propagation through dense granular systems, we carry out discrete element simulations of the system response to excitations where we control the driving frequency and wavelength independently. The soft-disk simulations are carried out in two spatial dimensions, and include the effects of energy loss due to inelasticity of collisions, frictional damping, rotations, and polydispersity. Our ability to control independently spatial and temporal properties of the imposed perturbations allows us to extract significant new information. In particular, Fourier analysis of the system response shows that properties of the propagating signal strongly depend on the spatial scales introduced by the perturbation itself. Then, we consider a sheared granular system and discuss how shearing influences the nature of the propagating signal. The simulations are carried out using realistic system sizes and material properties, allowing for direct experimental verification of the obtained results.
AB - In order to probe the process of energy propagation through dense granular systems, we carry out discrete element simulations of the system response to excitations where we control the driving frequency and wavelength independently. The soft-disk simulations are carried out in two spatial dimensions, and include the effects of energy loss due to inelasticity of collisions, frictional damping, rotations, and polydispersity. Our ability to control independently spatial and temporal properties of the imposed perturbations allows us to extract significant new information. In particular, Fourier analysis of the system response shows that properties of the propagating signal strongly depend on the spatial scales introduced by the perturbation itself. Then, we consider a sheared granular system and discuss how shearing influences the nature of the propagating signal. The simulations are carried out using realistic system sizes and material properties, allowing for direct experimental verification of the obtained results.
KW - Dense granular matter
KW - Discrete element simulations
KW - Propagation
UR - http://www.scopus.com/inward/record.url?scp=70450201551&partnerID=8YFLogxK
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U2 - 10.1063/1.3179916
DO - 10.1063/1.3179916
M3 - Conference contribution
AN - SCOPUS:70450201551
SN - 9780735406827
T3 - AIP Conference Proceedings
SP - 293
EP - 296
BT - Powders and Grains 2009 - Proceedings of the 6th International Conference on Micromechanics of Granular Media
T2 - 6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009
Y2 - 13 July 2009 through 17 July 2009
ER -