Numéro
J. Phys. IV France
Volume 04, Numéro C5, Mai 1994
3ème Congrés français d'acoustique
3rd French conference on acoustics
Page(s) C5-1001 - C5-1004
DOI https://doi.org/10.1051/jp4:19945220
3ème Congrés français d'acoustique
3rd French conference on acoustics

J. Phys. IV France 04 (1994) C5-1001-C5-1004

DOI: 10.1051/jp4:19945220

Etude numérique de la focalisation aléatoire d'une onde se propageant dans une turbulence thermique 2D

Ph. BLANC-BENON and D. JUVÉ

Ecole Centrale de Lyon, Laboratoire de Mécanique des Fluides et d'Acoustique, URA 263 du CNRS, ECL, BP. 163, 69131 Ecully cedex, France


Abstract
We consider the propagation of acoustic waves, in either the geometric or the parabolic approximation, through an ensemble of realizations of a random field modeling a 2D homogeneous isotropic thermal turbulence. Our results for a plane wave demonstrate that the occurrence of caustics as well as the maximum peak in the scintillation index are governed by the same universal parameter related to the correlation function of the temperature fluctuations.



© EDP Sciences 1994