Velocity correlations in a quasi-2D driven granular fluid are studied in experiments and numerical simulations. The transverse velocity structure factor reveals two well-defined energy scales, associated with the external "bath temperature"Tband with the internal granular one, Tg<Tb, relevant at large and small wavelengths, respectively. Experimental and numerical data are discussed within a fluctuating hydrodynamics model, which allows one to define and measure a non-equilibrium coherence length, growing with density, that characterizes order in the velocity field. © Europhysics Letters Association.

Non-equilibrium length in granular fluids: From experiment to fluctuating hydrodynamics

Sarracino, A.;
2011

Abstract

Velocity correlations in a quasi-2D driven granular fluid are studied in experiments and numerical simulations. The transverse velocity structure factor reveals two well-defined energy scales, associated with the external "bath temperature"Tband with the internal granular one, Tg
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/398943
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