Phase Transition and Turbulence: An Introduction

In the first part of the talk, I shall try to list the general ideas and the theoretical methods which have been most fruitful for phase transitions. This part is oriented towards the fraction of this audience which works primarily on fluid mechanics. In the second part, I shall present some salient facts about turbulence, and here my aim is to bring a slight help to the physicists. In both cases, my views will be schematic and naive. Nevertheless, I hope that they can help to bridge the gap between the two schools of thought.