Fundamentals and recent advances in Particle Image Velocimetry and Lagrangian Particle Tracking

15th - 18th November 2021

Location: Online / On-site Lecture Series:
von Karman Institute for Fluid Dynamics
Waterloosesteenweg 72
B-1640 Sint-Genesius-Ride (near Brussels)
Belgium

Organiser: von Karman Institute for Fluid Dynamics (SIG32)

Lecture Series Directors:

• Prof. Stefano Discetti, from Universidad Carlos III de Madrid, Spain 
• Prof. Miguel Mendez from the von Karman Institute, Belgium

Keywords: Particle Image Velocimetry, Lagrangian Particle Tracking, Fluid Flow Measurements, Optical Techniques

The lecture series will host a poster session, which will allow the participants to further exchange and interact with the lecturers.
All the participants are encouraged to submit a 1 page abstract before 1 October 2021

All information is availablehere

INTRODUCTION

Particle Image Velocimetry (PIV) has now matured as a versatile and robust tool for flow measurements. PIV is a technique able to measure instantaneous velocity fields in 2D and 3D domain at many points simultaneously, opening the path to field measurements of derivative quantities such as vorticity and strain. The range of application in fluid dynamics research covers a wide spectrum, ranging from microscopic to macroscopic scales of the atmospheric flows, from iposonic to hypersonic regime. The recent hardware and data-processing advances, especially in the fields of time-resolved PIV and volumetric Lagrangian Particle Tracking (LPT), have established PIV as a prominent technique in experimental fluid mechanics research and a must-have tool for top-class laboratories.

In recent years, PIV has undergone important changes, which have demonstrated the potential of further extending its reach. Leveraging physical principles opens the scenario to measuring thermodynamic variables and achieve a complete flow description. Progressive blending with machine-learning techniques, low-order modelling and data-assimilation methods are also contributing to enriching the output of PIV measurements. To date, PIV is the most prominent candidate to become a complete flow measurement tool, capable to provide a complete flow description in terms of kinematic and thermodynamic variables.

The aim of this course is to discuss the fundamentals of the technique, and initiate the attendees to the most recent developments in the field of PIV and LPT. The course will provide a complete overview of planar and volumetric PIV and LPT,includingexamplesofapplication in a wide range of flows. A review of the state-of-art methods for data post-processing will also be included. The lectures will include practical examples with code writing of PIV image processing and data post- processing, with emphasis on the “human factor” in PIV image analysis and on the importance of robust algorithms to reduce measurement uncertainty. To this purpose, a PIV-interactive-session will be proposed, where the attendees will be invited to analyze images with their custom-made software or with open software available online.

The course is primarily directed to forthcoming PIV practitioners who wish to become expert users and/or developers of PIV. No previous knowledge is required besides basic understanding of fluid flows. The lecture series is currently organized as an online event. If the COVID situation will allow for it, the course will be given in both online and on-site format.

In this case, two visits and a laboratory demo will be organized on Wednesday and Thursday, as indicated in the course programme, for the participants on site.

Preliminary agenda

Monday 15 November 2021: Fundamentals

08:00 Registration
08:30 Welcome address and course introduction
09:00 PIV: background and working principle - Prof. Fulvio Scarano, TU DELFT, The Netherlands
10:30 Coffee Break
11:00 PIV image processing techniques - Prof. Tommaso Astarita, Universitá degli Studi di Napoli Federico II, Italy

12:30 Lunch

14:00 Image pre-processing methods - Prof. Andrea Ianiro, Universidad Carlos III de Madrid, Spain
15:30 Coffee Break
16:00 Write your own PIV code – PIV interactive session - Prof. Tommaso Astarita, Universitá degli Studi di Napoli Federico II, Italy
17:30 Reception

Tuesday 16 November 2021: 3D PIV

09:00 Stereoscopic Particle Image Velocimetry - Prof. Tommaso Astarita, Universitá degli Studi di Napoli Federico II, Italy
10:30 Coffee Break
11:00 Time-resolved PIV/LPT: hardware and new opportunities - Prof. Christian J. Kähler, Universität der Bundeswehr München, Germany
12:30 Poster Session – posters will be on display during the entire Lecture Series

13:15 Lunch

14:15 Tomographic Particle Image Velocimetry- Prof. Stefano Discetti, Universidad Carlos III de Madrid, Spain
15:45 Coffee Break
16:15 3D Lagrangian Particle Tracking - Prof. Andreas Schroeder, DLR, Germany
17:45 End of day

Wednesday 17 November 2021: Data conditioning, post-processing and validation

09:00 Uncertainty estimation - Prof. Andrea Sciacchitano, TU DELFT, The Netherlands
10:30 Coffee Break
11:00 Statistical treatment, Fourier and modal decompositions - Prof. Miguel A. Mendez, von Karman Institute for Fluid Dynamics, Belgium

12:30 Lunch

13:30 Laboratory Visit (For participants on site, if allowed by COVID regulations)
14:30 Statistical methods to enhance PIV measurements - Prof. Stefano Discetti, Universidad Carlos III de Madrid, Spain
16:00 Coffee Break
16:30 Derivation of significant flow quantities - Prof. Andreas Schroeder, DLR, Germany
18:00 End of day

Thursday 18 November 2021: Applications

09:00 Micro- and Long-range-micro-PIV - Prof. Christian J. Kähler, Universität der Bundeswehr München, Germany
10:30 Coffee Break
11:00 PIV in industrial applications - Prof. Andreas Schroeder, DLR, Germany

12:30 Lunch

13:30 Laboratory Demo (For participants on site, if allowed by COVID regulations)
14:30 Large-scale PIV applications - Prof. Fulvio Scarano, TU DELFT, The Netherlands
16:00 Coffee Break
16:30 Discussion on PIV interactive session results, round table and closure remarks - Lecturers and Participants
17:45 End of day