R?centes Applications des Techniques Electrodiffusionnelles en Ecoulement Diphasique

This article concerns "non conventional" uses of the electrochemical method applied to the study of two-phase flows. One deals with the analysis of transport phenomena at liquid-liquid interface in a set-up where the active electrode is made of Gallium, which is a metal changing from solid to liquid state almost at room temperature (29,8 ?C). With the same hydrodynamic conditions an appreciable reduction of transfer is observed when passing through the melting point to the liquid state. The other application uses a three-segmented probe which is convenient for 3-D analysis of flow. The stability of solid-liquid flow (i.e. fiber suspension) is studied in a Taylor-Couette device. The influence of the fibers on the secondary flow is pointed out.