Structure des perturbations dans une couche limite turbulente : zone d'intermittence
Résumé
Triple spatiotemporal correlation measurements of temperature fluctuations in three points were made in the intermittence zone of a turbulent boundary layer on a flat heated wall. A strong increase in width of the coherence zone of the perturbations coming from the region close to the wall was noted. The conditional correlation measurements show that perturbations of a given sign are very conservative when one considers their transport with the mean turbulent field.