# Robert P. Behringer

## James B. Duke Professor of Physics

### Overview

Dr. Behringer's research interests include granular materials: friction, earthquakes, jamming; nonlinear dynamics; and fluids: Rayleigh-Benard convection, the flow of thin liquid films, porous media flow, and quantum fluids. His studies focus particularly on experiments (with some theory/simulation) that yield new insights into the dynamics and complex behavior of these systems. His experiments involve a number of highly novel approaches, including the use of photoelasticity for probing granular systems, innovative experiments to characterize the stability of surface flows and properties of gels, and magnetic resonance imaging to study flows in porous media.

Kondic, L, Fang, X, Dybenko, OM, and Behringer, RP. "Energy transport through dense granular matter." *AIP Conference Proceedings* 1145 (2009): 293-296.
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Tang, J, Sagdiphour, S, and Behringer, RP. "Jamming and flow in 2D hoppers." *AIP Conference Proceedings* 1145 (2009): 515-518.
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Tordesillas, A, Zhang, J, and Behringer, R. "Buckling force chains in dense granular assemblies: Physical and numerical experiments." *Geomechanics and Geoengineering* 4.1 (2009): 3-16.
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Sanfratello, L, Fukushima, E, and Behringer, RP. "Using MR elastography to image the 3D force chain structure of a quasi-static granular assembly." *Granular Matter* 11.1 (2009): 1-6.
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Kondic, L, Dybenko, OM, and Behringer, RP. "Signal Propagation Through Dense Granular SystemsProbing dense granular materials by space-time dependent perturbations." *Phys. Rev. E* 79 (2009): 041304-. (Academic Article)

Krim, J, and Behringer, RP. "Friction, force chains, and falling fruit." *Physics Today* 62.9 (2009): 66-67.
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Lois, G, Zhang, J, Majmudar, TS, Henkes, S, Chakraborty, B, O'Hern, CS, and Behringer, RP. "Stress correlations in granular materials: An entropic formulation." *Physical Review E - Statistical, Nonlinear, and Soft Matter Physics* 80.6 (2009).
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Zhang, J, Ren, J, Farhadi, S, Behringer, RP, Majmudar, TS, and Tordesillas, A. "A dense 2D granular material subject to cyclic pure shear." *AIP Conference Proceedings* 1145 (2009): 553-556.
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Kondic, L, Dybenko, OM, and Behringer, RP. "Probing dense granular materials by space-time dependent perturbations." *Physical Review E - Statistical, Nonlinear, and Soft Matter Physics* 79.4 (2009).
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Zhang, J, Behringer, RP, Majmudar, TS, and Sperl, M. "Experiments on force fluctuations and the jamming transition." *AIP Conference Proceedings* 1145 (2009): 527-530.
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