21 janvier 2021

Wébinaire Fulvio Scarano

Fulvio Scarano graduated in Aerospace Engineering at University of Naples (1996). Obtained the Ph.D. in 2000 (von Karman Institute, Theodor von Karman prize) and joined TU Delft at the faculty of Aerospace Engineering in the Aerodynamics Section in the same year. Since 2008 he is full professor of Aerodynamics and acted as head of section since 2010. Starting director of Aerospace Engineering Graduate School (2012). Currently director of the AWEP department (Aerodynamics, Wind Energy, Flight Performance and propulsion). Recipient of Marie-Curie grant (1999), Dutch Science Foundation VIDI grant (2005) and of the European Research Council grant (ERC, 2009). European project coordinator (AFDAR, Advanced Flow Diagnostics for Aeronautical Research, 2010-2013). Promoted and supervised more than 30 PhDs. The research interests cover the development of particle image velocimetry (PIV) and its applications from fundamental turbulence, to vehicle and sports aerodynamics to the high-speed in the supersonic and hypersonic regime. Author of more than 200 publications, delivered many keynote lectures worldwide. He acts in the scientific board of many international conferences and journals, Measurement Science and Technology and Experiments in Fluids, among others.
Fundamentals and Applications of Physics Based Data Restoration from 3D PIV

Abstract: Three-dimensional Particle Image Velocimetry (3D-PIV) has developed over more than a decade into a versatile tool for the inspection and visualization of complex three-dimensional flows. By means of the tomographic PIV technique, the principal domain of application has been the study of fundamental turbulent flow phenomena occurring in boundary layers, wakes, jets including pressure evaluation and aeroacoustics. More recently, particle based analysis (3D-PTV and Shake-the-Box) have further paved the way to 3D and 4D flow analysis.

The availability of measurements on an increased number of dimensions in space and time has also stimulated the imagination of researchers to expand the techniques for data restoration. In particular to move from signal-processing based (e.g. spatio-temporal filters, proper orthogonal decomposition) to physics based methods. The latter assimilate measurements with the flow governing laws to yield data reconstruction conditioned towards physical consistency.

This seminar will provide a survey of such methods as they have appeared in the literature related to PIV and in relation to relevant applications with experiments. The techniques are categorized based on their objective:

1) Increasing temporal resolution (pouring Space into Time, time-supersampling);
2) Data regularization (e.g. solenoidal filtering, Lagrangian data filtering);
3) Enhancing spatial resolution (pouring Time into Space, VIC+, Shake-the-Box, Time-Segment Assimilation);
4) Pressure from PIV.

The working principles of the methods are briefly discussed, pointing the reader to the relevant literature for a detailed discussion. The impact of each technique is then discussed first by simplified cases that illustrate their potential and limitations. Examples from real-life experiments are then brought forward to illustrate the current level of applicability of these methods.

21 janvier 2021, 16h3017h30
Wébinaire (contacter F. Romano pour le lien)

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01 décembre 2022

Wébinaire Esteban Ferrer

New avenues in high order fluid dynamics

Esteban Ferrer est professeur de mathématiques appliquées à l'école d'aéronautique (ETSIAE-UPM). Il a obtenu son doctorat à l'université d'Oxford (Royaume-Uni) et possède 20 ans d'expérience industrielle et universitaire dans le développement de techniques numériques pour les problèmes de fluides. Il travaille activement avec l'industrie et coordonne deux projets Européens. Ses principaux intérêts sont les méthodes d'ordre élevé pour la dynamique des fluides, la modélisation de la turbulence, l'apprentissage automatique, l'aéroacoustique pour l'aéronautique et l'énergie éolienne. Il a rédigé plus de 90 articles de journaux et de conférences sur ces sujets.