3rd Workshop and Challenge on Data Assimilation & CFD Processing for PIV and Lagrangian Particle Tracking


Location: Hotel Real Palacio, Lisbon, Portugal

Date: 11th - 12th July 2020

SIG: SIG32 Particle Image Velocimetry

Organisers: ​
Dr. Andreas Schröder, DLR, AS-EXV, Bunsenstr. 10, 37073 Göttingen, Germany​
Dr. Benjamin Leclaire, ONERA, DAAA, Meudon-Paris, France ​
Dr. Andrea Sciacchitano, TU Delft, Delft, The Netherlands


We would like to draw your attention to this workshop that is scheduled just before the Lisbon Symposium next year. Recently several data assimilation (DA) methods have been developed at the junction between experimental and numerical fluid mechanics and aerodynamics. DA allows increasing the spatial and temporal resolution of sparse measurement data and calculating and extracting physical meaningful content like pressure fields, coherent structures  or periodic flow features for a better insight into the flow dynamics. We assume you might be interested in participating, sharing your views, experience and of course latest research results within a relatively small and focused community.


Many procedures are nowadays available that increase or enhance the information measured with Particle Image Velocimetry (PIV) or Lagrangian Particle Tracking (LPT) using techniques imported from the CFD and applied mathematics community. The advent of time-resolved and volumetric measurements have multiplied the possibilities with much excitement  of PIV  and LPT development researchers as well as from the applied fluid mechanics community. The methods range from regularization strategies using the (simplified) Navier-Stokes-equation or the use of the momentum equation to obtain pressure from velocity and acceleration measurements, machine learning, to variational data-assimilation frameworks using adjoint CFD.

Organization and topics of workshop

The workshop will take place at the Hotel Real Palacio  (R. Tomás  Ribeiro  115, Lisbon) on Saturday and Sunday, July 11-12,  2020  – the days  before the begin of the Lisbon laser symposium (http://www.lisbon-lasersymposium.org/lxlaser2020 ).

Talks are planned on the following areas:

  • Data assimilation techniques for flow measurements / PIV / LPT
  • Particle tracking in densely seeded flows
  • Pressure and loads from PIV / LPT
  • Variational techniques using adjoint Navier-Stokes for PIV / LPT
  • Machine learning and data driven (modal) analyses

The presentations (~15-minutes) will focus on recent studies, but as well on a larger perspective and showing the relevant work of different research groups related to data-assimilation for PIV and LPT processing. Several presentations are already confirmed. A detailed agenda will follow begin of May 2020. Do not hesitate to contact us in case you have any questions or require further information.

Challenge on 3D LPT and Data Assimilation

In February 2020 a synthetic test case based on an incompressible turbulent boundary layer flow with a dynamic wall deformation will be provided via a download link to the participants of two challenges:

1)  A time-series of synthetic particle images created by four virtual camera views of tracer particles in the TBL flow and random dots at the deforming wall will be
provided together with the calibration data in order to  challenge the latest LPT code developments.

2)  A large number of randomly distributed 3D particle tracks over many time- steps representing the flow and dynamic surface deformations are provided as starting
points of a data assimilation challenge.

Both results will be compared with and assessed by physical measures (position, velocity, pressure, etc.) of the full LES input data. The presentation of the challenge results will cover one-half day of the workshop.

Website: http://cfdforpiv.dlr.de/

Dates and deadlines

Friday, April 3, 2020, Deadline for Two-page-abstract submission Please send abstracts to catrin.rosenstock@dlr.de
Friday, May 1, 2020, Notification of Acceptance and Deadline for upload of LPT and Data assimilation challenge results
Friday, June 26, Deadline for Registration (limitation to 60 participants)
Saturday/Sunday, July 11-12, 2020 Workshop


Registration should be done on the workshop website only.  All details  are given there. The registration is free of charge and includes coffee breaks and one lunch. The workshop is financially supported by ERCOFTAC, LaVision GmbH and the H2020 EU project HOMER.


Organizing committee

Dr. Andreas Schröder, DLR, AS-EXV, Bunsenstr. 10, 37073 Göttingen, Germany, e-mail: Andreas.Schroeder@dlr.de
Dr. Benjamin Leclaire, ONERA, DAAA, Meudon-Paris, France, e-mail: Benjamin.Leclaire@onera.fr
Dr. Andrea Sciacchitano, TU Delft, Delft, The Netherlands, e-mail: A.Sciacchitano@tudelft.nl


Mrs. Catrin Rosenstock, DLR, AS, Bunsenstrasse 10, 37073 Göttingen, Germany; Tel: +49 551 709 2468, Fax: + 49 551 709 2830, e-mail: catrin.rosenstock@dlr.de

How to reach the workshop location?

Airplane to Lisbon airport
Metro Linea Vermelha from Lisbon Aeroporto to Metro Station São Sebastião
Metro Linea Azul at Station Parque Metro Linea Amarela at Station Picoas

Looking forward to seeing you in Lisbon !!!