Preface

Fourth Madrid Summer School on Turbulence Editor: Javier Jiménez The fourth biannual Summer School on Turbulence at the School of Aeronautics of the Universidad Politécnica de Madrid took place from June 10 to July 12, 2019. It was funded by the Coturb grant of the European Research Council, whose goal is to understand turbulence from a structural point of view. As in the preceding three Schools, the present one aimed to provide a meeting place for theoreticians, experimentalists and simulators, in which to develop and test new ideas on turbulence physics and structure. For the first time, this edition included a substantial number of projects centring on data processing techniques, including machine learning. Around fifty, mostly young, participants from twenty four international groups met for five weeks of collaborative work, primarily using the computational data archived in the receiving institution but, in many cases, also contributing their own. Although the format included some invited seminars and periodic plenary meetings, most of the work took place in small groups whose composition occasionally changed during the workshop. These proceedings reflect the results of the work of these groups, which, in many cases, later continued in the form of new collaborations. List of Workshop organiser, Photos, Logos are available in this pdf.