Our lab focusses on the investigation of unsteady flow phenomena by combining high spatially and temporally resolved flow field measurements with – what we refer to as – a fluid dynamical differential diagnosis. We develop methodologies to help bridge the gap between our observations and understanding of the development and interaction of characteristic flow structures (e.g. vortices) and technically relevant quantities, such as aerodynamic forces or power output, with applications in biological and bio-inspired flight, wind turbine rotor blade aerodynamics, etc.

News

20.05.2019

UNFoLD welcomes a new visitor

Logan has joined UNFoLD for the summer as a participant of the EPFL Excellence in Engineering fellowship programme.

01.05.2019

Distinction

Our two contributions Make vortices not war and Vorticious received a distinction from the jury of the SNSF Scientific image competition.

22.04.2019

New paper “Coherent structure interaction during unsteady separation” by Matthew Melius, Karen, and Raul Bayoan Cal from Portland State University has been accepted for publication in the AIAA Journal

09.04.2019

New paper “Effect of pitch on the flow behavior around a hovering wing” by Swathi as main author in collaboration with Melissa Green from Syracuse University has been accepted for publication in Experiments in Fluids and is now online.

07.03.2019

Kudos to Diego for his performance in the MT180 final

04.02.2019

UNFoLD welcomes a new visitor

David has joined UNFoLD as a visiting master student from the University of Applied Sciences Wiener Neustadt

01.01.2019

UNFoLD welcomes a new post-doc

Armelle will be a joint post-doc strengthening the collaboration between flexLab and UNFoLD

26.12.2018

Paper “Multi-scale vortex characteristics of dynamic stall from empirical mode decomposition” by Phillip Ansell from the University of Illinois at Urbana-Champaign and Karen has been accepted for publication in the AIAA Journal and is now online

03.12.2018

Congratulations to Diego and Sabrina

for passing their candidacy exam

02.11.2018

UNFoLD welcomes another visitor

Esra has joined UNFoLD as a visiting master student from the TU Darmstadt

15.10.2018

UNFoLD welcomes a new visitor

Shuji has joined UNFoLD as a visiting PhD student from the University of Edinburgh

18.09.2018

UNFoLD welcomes another new member

Alex has rejoined UNFoLD as PhD student

01.09.2018

UNFoLD welcomes a new member

Artem has joined UNFoLD as PhD student

27.08.2018

UNFoLD welcomes a new visitor

Philipp has joined UNFoLD as a visiting PhD student from the Leibniz Universität Hannover

15.08.2018

Paper “Genetic algorithm based optimization of wing rotation in hover” by Alex, Guillaume, and Karen has been published in the special issue Bio-inspired Flow in the MDPI open access journal Fluids and is now available online

18-19.07.2018

Diego and Sabrina presented their first experimental results at the 19th International Symposium on Applications of Laser and Imaging Techniques to Fluid Mechanics in Lisbon, Portugal. The accompanying papers “Lagrangian analysis of the formation of vortices on a rotating flat plate” and “Dynamic stall vortex shedding and associated load fluctuations” are now online. Special thanks to Emilie, Guillaume, Agastya, and Julien, who significantly contributed to the work that was presented!

15.07.2018

UNFoLD welcomes two new members

Guosheng is our new post-doc and Gabriele is our summer intern from the Talenti Neodiplomati 2018 program

09.07.2018

UNFoLD welcomes a new visitor

Rohit has joined UNFoLD as a visiting PhD student from the University of Illinois at Urbana-Champaign

21.06.2018

Julien presented his latest work at the Torque 2018 conference in Milan, Italy. The accompanying paper “Critical evolution of leading edge suction during dynamic stall” by Julien Deparday and Karen Mulleners is now online.

01.06.2018

UNFoLD welcomes a new member

Sebastien has joined UNFoLD as PhD student

15.04.2018

UNFoLD welcomes a new member

Agastya has joined UNFoLD as a research intern

21.03.2018

Paper: “The role of surface vorticity during unsteady separation” by Matthew Melius, Karen Mulleners, and Raul Cal has been accepted for publication in the Physics of Fluids.

01.03.2018

Congratulations to Guillaume

for passing his candidacy exam

22.01.2018

Paper: “Cross-correlation analysis of synchronized PIV and microphone measurements of an oscillating airfoil” by Lars Siegel, Klaus Ehrenfried, Claus Wagner, Karen Mulleners, and Arne Henning has been accepted for publication in the Journal of Visualization.

15.01.2018

UNFoLD welcomes another new member

Diego has joined UNFoLD as PhD student

03.01.2018

UNFoLD welcomes 2 new members

Adrien and Sabrina have joined UNFoLD as PhD students

08.12.2017

Water channel inauguration

Sharx has been officially inaugurated!
sharx is a facility for hydro and aerodynamic research experiments
more on sharx  

06.12.2017

Paper “Flow field and force evolution for a symmetric hovering flat plate wing” by Swathi Krishna, Melissa A. Green, and Karen Mulleners has been accepted for publication in the AIAA Journal.

02.10.2017

UNFoLD welcomes 2 new members

Julien is our new post-doc and Alex is visiting from Germany for his master thesis.

29.09.2017

Winter is coming ...

We said our water tunnel was going to be ready by the end of summer.
Thanks to Robert and Marco for a great job!

29.09.2017

Funding granted

Our project Reconfigurable airfoil shape and orientation for improved performance during stroke and flow reversal with Prof. Jamie Paik as partner will be funded by the Swiss National Science Foundation.

31.08.2017

First doctoral graduate at UNFoLD

We proudly announce that Swathi has successfully defended her doctoral thesis entitled ‘Unsteady fluid dynamics around a hovering flat plate wing‘ during the private defence. Congratulations Swathi!

22.08.2017

A much anticipated delivery!

03.08.2017

Paper “Analysis of intermittent trailing edge vortex shedding using recurrence plots” by Karen Mulleners and Markus Rütten has been accepted for publication in the AIAA Journal.

01.06.2017

Achal has joined UNFoLD as a research intern

19.05.2017

Funding granted for collaborative research project on aeroacoustics

SNSF and DFG have granted us funding for the collaborative research project Combined aeroacoustic and flow diagnostic analysis of the motion induced sound generation by an oscillating airfoil with active flap proposed by us in collabortation with Arne Henning from DLR in Göttingen.

15.05.2017

Assistant Professor Energy Grant awarded

We received a 2017 AP Energy Grant from the Swiss National Science Foundation for our project smart-H to investigate dynamic stall on H-type wind turbines.

15.03.2017

Guillaume has joined UNFoLD as a PhD student

27.02.2017

La La Laser

Thanks to Frank from ILA_5150 for the training session and the installation of our new PIV systems

02.02.2017

UNFoLD welcomes a new visitor

Sebastian has joined UNFoLD as a visiting student

19.01.2017

Paper “Flow development on a flat plate wing subjected to a stream-wise acceleration” by Karen Mulleners, Peter Mancini, and Anya R Jones has been accepted for publication in the AIAA Journal.