Publications

Size Amplification of Jet Drops due to Insoluble Surfactants

Collaborative experimental and numerical study on the jet drops produced by the collapse of a bubble covered with insoluble surfactants. J.E. and T.A. contributed equally to this work.

Eshima, J., Aurégan, T., Farsoiya, P. K., Popinet, S., Stone, H., & Deike, L. (2025)

Surface bubble lifetime in the presence of a turbulent air flow, and the effect of surface layer renewal

Investigations of surface bubble drainage and lifetime when the air above the water surface is turbulent, with different surfactant concentrations and salts. Precisely controlling the experimental conditions, we are able to predict the evolution of the bubble lifetime with the Reynolds number in the absence of impurities and observe a transition between regimes in the case with salt added.

Aurégan, T., & Deike, L. (2025).

Drainage and lifetime of thin liquid films: the role of salinity and convective evaporation

Experimental study of thin liquid films in the presence of salt. We show that the drainage is unaffected by the salinity of the solution or the humidity of the air surrounding the film while the lifetime is controlled by evaporative rate.

Aurégan, T., & Deike, L. (2025). Journal of Fluid Mechanics, 1012, A18.

Improving propulsive efficiency using bio-inspired intermittent locomotion

Experiments investigating Burst and Coast locomotion in the context of propeller propulsion. Experiments show a reduction of the energetic cost of locomotion of 24% for a given velocity, and a model allows us to find the minimal drag reduction for intermittent locomotion to be interesting.

Aurégan, T., Lemoine, M., Thiria, B., & Courrech du Pont, S. (2024). Journal of the Royal Society Interface, 22:20240624

Shape reconfiguration for underwater propeller efficiency improvement

How a propeller with flexible blades can passively adapt to a change of external conditions to remain optimally efficient. With a combination of experiments and scaling law, we demonstrate how this techhnology can be implemented.

Aurégan, T., Thiria, B., & Courrech du Pont, S. (2024). Physical Review Fluids, 9(7), 074402.

Scaling the thrust and deformations of a rotor with flexible blades

Small scale experiments with a propeller with fully flexible blades. We record and explain the non-linear deformations at tip of the blades.

Aurégan, T., Thiria, B., & Courrech du Pont, S. (2023). Physical Review Fluids, 8(4), 044401.

Flow past a sphere translating along the axis of a rotating fluid: revisiting numerically Maxworthy's experiments

Direct numerical simulations of the flow around a sphere translating along the axis of a rotating fluid. This study highlights the importance of axial confinement on the drag force on the sphere.

Aurégan, T., Bonometti, T., & Magnaudet, J. (2023). Journal of Fluid Mechanics, 967, A25.