RESEARCH
SNAP-THROUGH TRANSITIONS
Snap-Through transitions occur when an elastic structure remains in an equilibrium configuration that suddenly ceases to exist or becomes unstable. The structure is then forced to "jump" to another equilibrium configuration through a brutal shape transition. This phenomenon is harnessed by different species in nature to generate large amplitude and fast motion. This is the case, for example, with venus flytraps and hummingbirds that harness this mechanism to trap their preys. While these transitions are known to be related to the type of bifurcation the system undergoes, there is no general understanding of the mechanisms that select these bifurcations. In this work, we address this problem by analyzing simple systems where an elastic strip is maintained in a buckled configuration and actuated by translating or rotating its boundaries.
With H. Bense, L. Domino, G. Kozyreff, E. Kanso
FLAME FRONT DYNAMICS
A premixed flame is a self sustained chemical reaction that propagates through a gaseous reactive mixture. Under certain conditions, this reactive fluid dynamic problem can be reduced to an equation describing the dynamics of the reactive front. These simplified models provide a fundamental understanding of the physical mechanisms at play in premixed flame dynamics. However, a very few studies have performed quantitative comparisons between the dynamics described by these front equations and the one observed with experimental flames. One of the major difficulties is the three dimensional aspect of the reactive front that makes it difficult to analyze experimentally. In this work we address these questions by carrying experiments in a Hele-Shaw burner, an apparatus that makes the dynamics quasi bidimensional and allows to access the exact shape of the flame at every instant in time.
With C. Almarcha, B. Denet, E. Villermaux, P. Boivin, J. Quinard, E. Al-Sarraf, P.L. Garcia Ybarra, J. Piketty-Moine, M. Tayyab.
PUBLICATIONS
- Radisson B, Bense H., Siéfert E., Domino L., Hoa-Ai B-H., Brau F. Optimal rigid brush for fluid capture.
- Radisson B, Kanso E. Designing Shape Transitions in Elastic Structures. Journal of the Physical Society of Japan, 2023, vol. 92, no 12, p. 121010.
- Kozyreff G, Siéfert E, Radisson B, Brau F The θ-formulation of the 2D elastica - Buckling and boundary layer theory. Proceedings of the Royal Society A, 479(2275), 20230087. On the cover
- Battikh M, Al Sarraf E, Radisson B, Almarcha C, Denet B. Nonlinear dynamics of upward propagating flames. Physical Review E, 2023, vol. 107, no 6, p. 065110.
- Radisson B, Kanso E. Dynamic behavior of elastic strips near shape transitions. Physical Review E, 2023, vol. 107, no 6, p. 065001.
- Radisson B, Kanso E. Elastic snap-through instabilities are governed by geometric symmetries. Physical Review Letters, 2023, vol. 130, no 23, p. 236102. Editors' Suggestion
- Radisson B, Denet B, Almarcha C. Forcing of a flame by a periodic flow in a Hele-Shaw burner. Physical Review Fluids, 2022, vol. 7, no 5, p. 053201.
- Radisson B, Denet B, Almarcha C. Nonlinear dynamics of flame fronts with large-scale stabilizing effects. Physical Review E. 2021 Jun 11;103(6):063104.
- Radisson B, Denet B, Almarcha C. Nonlinear dynamics of premixed flames: from deterministic stages to stochastic influence. Journal of Fluid Mechanics. 2020 Nov;903.
- Tayyab M, Radisson B, Almarcha C, Denet B, Boivin P. Experimental and numerical lattice-Boltzmann investigation of the Darrieus–Landau instability. Combustion and Flame. 2020 Nov 1;221:103-9.
- Radisson B, Piketty-Moine J, Almarcha C. Coupling of vibro-acoustic waves with premixed flame. Physical Review Fluids. 2019 Dec 24;4(12):121201.
- Al Sarraf E, Almarcha C, Quinard J, Radisson B, Denet B, Garcia-Ybarra P. Darrieus–Landau instability and Markstein numbers of premixed flames in a Hele-Shaw cell. Proceedings of the Combustion Institute. 2019 Jan 1;37(2):1783-9.
- Almarcha C, Radisson B, Al Sarraf E, Villermaux E, Denet B, Quinard J. Interface dynamics, pole trajectories, and cell size statistics. Physical Review E. 2018 Sep 14;98(3):030202.
- Al Sarraf E, Almarcha C, Quinard J, Radisson B, Denet B. Quantitative analysis of flame instabilities in a Hele-Shaw burner. Flow, Turbulence and Combustion. 2018 Oct;101(3):851-68.
FORTHCOMING
2023
2022
2021
2020
2019
2018
TEACHING/MENTORING
SKATEBOARDING PHYSICS
We study the dynamics of a skateboard robot that moves its center of mass up and down along the radial direction of the ramp thereby mimicking the crouching motion performed by real skateboarders to increase their speed. We show that this up and down motion acts as a parametring forcing that triggers a resonance responsible for an increase in amplitude of the skateboard oscillations.
by A. Thuillier (M2 internship École de l'air et de l'espace)
DUFFING OSCILLATOR
We study the dynamics of a rubber ball evolving in a double potential well landscape forced by a sinusoidal motion, a setup designed to study experimentally the dynamics of the Duffing Oscillator.
by L. Gally and R. Utulo (L3 internship Sorbonne Université) in collaboration with A. Hajczak (MCF Sorbonne Université) and JC. Chassaing (Prof. Sorbonne Université)
RESOURCES
Here are some online resources that I found interesting and also a few documents related to my research.
-An article by Romain Brette about the general organization of research.
-A talk given by Marie Farge (in french) about scientific publishing.
- Marc Buffat's webpage (in french) for the interactive courses based on Python notebooks and other Arduino projects resources.
- Antoine Bérut's webpage for the very clear and convenient PhD thesis manuscript template in Latex and other interesting resources about Arduino, Python and his personal research.
-Here is a tutorial on how to drive a stepper motor in order to achieve a sinusoidal motion (using Arduino).
-Here is my PhD thesis manuscript: the first part is in French, the second is in Frenglish (sorry to both French and English speakers)...
CONTACT
Laboratoire Interdisciplinaire de Physique
140 Rue de la Physique
38402 Saint-Martin-D'Hères