1D energy transport in a strongly scattering laboratory model

Details 1D energy transport in a strongly scattering laboratory model 1D energy transport in a strongly scattering laboratory model

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrve..69c6611v&link_type=abstract

Physical Review E, vol. 69, Issue 3, id. 036611

Computer Science

Sound

9

Wave Propagation In Random Media, Ultrasonics, Quantum Acoustics, And Physical Effects Of Sound, Surface Waves And Free Oscillations, Radiative Transfer, Scattering

Scientific paper

Radiative transfer (RT) theory is often invoked to describe energy propagation in strongly scattering media. Fitting RT to measured wave field intensities is rather different at late times, when the transport is diffusive, than at intermediate times (around one extinction mean free time), when ballistic and diffusive behavior coexist. While there are many examples of late-time RT fits, we describe ultrasonic multiple scattering measurements with RT over the entire range of times—from ballistic to diffusive. In addition to allowing us to retrieve the scattering and absorption mean free paths independently, our results also support theoretical predictions in 1D that suggest an intermediate regime of diffusive (nonlocalized) behavior.

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