Caractérisation d'une couche de cisaillement complexe confinée par traceur thermique

Introduction of a thermal field as a passive scalar seeding has been made in a channel with significant wall-injection convection and presence of a predominant obstacle. In such a complex flow, the study of the temperature field provides a good description of the whole dynamic organization of the flow: development of a highly sheared flow, reversal region back to the obstacle… The scalar and the dynamic fields are close together, i.e. the study of the mean temperature and of its fluctuations allows analysis of the scales of flow turbulence and description of the creation of vortices in this sheared flow.