ENGINEERED SYSTems
FLAG FLUTTER INSTABILITY
What are the forces that a flag produces on its flagpole?
The periodic oscillations of a flag can be used to harvest wind energy.
The periodic oscillations of a flag can be used to harvest wind energy.
Chaotic dynamics of flags from recurring values of flapping moment pdf - journal
E. Virot, D. Faranda, X. Amandolese, P. Hémon. International Journal of Bifurcation and Chaos 27, 1750020 (2017)
Coupling between a flag and a spring-mass oscillator pdf - journal
E. Virot, X. Amandolese, P. Hémon. Journal of Fluids and Structures 65, 447–454 (2016)
Flottement de drapeau : dynamique & couplage (in French) phd thesis - archives
E. Virot. École Polytechnique (2015)
EP3161309 (B1) Energy recovery device by flag patent - espacenet
WO2015197621 (A1) Energy recovery device by flag patent - espacenet
FR3022957 (A1) Dispositif de récupération d'énergie à drapeau patent - espacenet
P. Hémon, X. Amandolese, E. Virot. (2014)
Fluttering flags: an experimental study of fluid forces pdf - journal
E. Virot, X. Amandolese, P. Hémon. Journal of Fluids and Structures 43, 385-401 (2013)
E. Virot, D. Faranda, X. Amandolese, P. Hémon. International Journal of Bifurcation and Chaos 27, 1750020 (2017)
Coupling between a flag and a spring-mass oscillator pdf - journal
E. Virot, X. Amandolese, P. Hémon. Journal of Fluids and Structures 65, 447–454 (2016)
Flottement de drapeau : dynamique & couplage (in French) phd thesis - archives
E. Virot. École Polytechnique (2015)
EP3161309 (B1) Energy recovery device by flag patent - espacenet
WO2015197621 (A1) Energy recovery device by flag patent - espacenet
FR3022957 (A1) Dispositif de récupération d'énergie à drapeau patent - espacenet
P. Hémon, X. Amandolese, E. Virot. (2014)
Fluttering flags: an experimental study of fluid forces pdf - journal
E. Virot, X. Amandolese, P. Hémon. Journal of Fluids and Structures 43, 385-401 (2013)
SHELL BUCKLING INSTABILITY
What is the minimal force to crush an empty coke can? Can we guarantee that a space rocket shell will never collapse?
Surprisingly, there is no universal answer to these seemingly basic questions about buckling of imperfection-sensitive thin shells.
Surprisingly, there is no universal answer to these seemingly basic questions about buckling of imperfection-sensitive thin shells.
Stability landscape of shell buckling pdf - journal
E. Virot, T. Kreilos, T. M. Schneider, S. M. Rubinstein. Physical Review Letters 119, 224101 (2017)
Highlighted in: APS Physics, InsideScience
On establishing buckling knockdowns for imperfection-sensitive shell structures pdf - journal
S. Gerasimidis, E. Virot, J. Hutchinson, S. M. Rubinstein. Journal of Applied Mechanics 85, 091010 - (2018)
Non-destructive prediction of the buckling load of imperfect shells pdf - journal
A. Abramian, E. Virot, E. Lozano, S. M. Rubinstein, T. M. Schneider. Physical Review Letters 125, 225504 (2020)
A non-destructive technique for the evaluation of thin cylindrical shells’ axial buckling capacity pdf - journal
K. Yadav, N. Cuccia, E. Virot, S. M. Rubinstein, S. Gerasimidis. Journal of Applied Mechanics 88 051003 (2021)
Transition to stress focusing for a locally curved sheet pdf - ArXiv - journal
T. Barois, I. Jalisse, L. Tadrist, E. Virot. Physical Review E 104, 014801 (2021)
Hitting the mark: probing at the initiation site allows for accurate prediction of a thin shell's buckling load pdf - journal
N. L. Cuccia, K. K. Yadav, M. Serlin, E. Virot, S. Gerasimidis, S. M. Rubinstein. Phil. Trans. of the Royal Soc. A, 381, 2244 20220036 (2023)
E. Virot, T. Kreilos, T. M. Schneider, S. M. Rubinstein. Physical Review Letters 119, 224101 (2017)
Highlighted in: APS Physics, InsideScience
On establishing buckling knockdowns for imperfection-sensitive shell structures pdf - journal
S. Gerasimidis, E. Virot, J. Hutchinson, S. M. Rubinstein. Journal of Applied Mechanics 85, 091010 - (2018)
Non-destructive prediction of the buckling load of imperfect shells pdf - journal
A. Abramian, E. Virot, E. Lozano, S. M. Rubinstein, T. M. Schneider. Physical Review Letters 125, 225504 (2020)
A non-destructive technique for the evaluation of thin cylindrical shells’ axial buckling capacity pdf - journal
K. Yadav, N. Cuccia, E. Virot, S. M. Rubinstein, S. Gerasimidis. Journal of Applied Mechanics 88 051003 (2021)
Transition to stress focusing for a locally curved sheet pdf - ArXiv - journal
T. Barois, I. Jalisse, L. Tadrist, E. Virot. Physical Review E 104, 014801 (2021)
Hitting the mark: probing at the initiation site allows for accurate prediction of a thin shell's buckling load pdf - journal
N. L. Cuccia, K. K. Yadav, M. Serlin, E. Virot, S. Gerasimidis, S. M. Rubinstein. Phil. Trans. of the Royal Soc. A, 381, 2244 20220036 (2023)
MONITORING FRICTION and DEFORMATION
• Why do sport shoes wear so fast? Why do car tires squeak in parkings?
I am working on these questions with the company BASF and the North American Center for Research on Advanced Materials.
nora.seas.harvard.edu
• Biomechanics of running
Effects of Footwear Cushioning on Leg and Longitudinal Arch Stiffness during Running pdf - journal
N. B. Holowka, S. M. Gillinov, E. Virot, D. E. Lieberman. Journal of Biomechanics, 110869 (2021)
I am working on these questions with the company BASF and the North American Center for Research on Advanced Materials.
nora.seas.harvard.edu
• Biomechanics of running
Effects of Footwear Cushioning on Leg and Longitudinal Arch Stiffness during Running pdf - journal
N. B. Holowka, S. M. Gillinov, E. Virot, D. E. Lieberman. Journal of Biomechanics, 110869 (2021)
• Ultrasonic lubrification
In the startup hap2u: translating the human perception of textures into an equivalent modulation of friction at the fingertip level.
In the startup hap2u: translating the human perception of textures into an equivalent modulation of friction at the fingertip level.
www.hap2u.net
• Nanodeformations
In the startup Wormsensing: developing a strain sensor that outperforms traditional strain gauges, while maintaining the same form factor.
In the startup Wormsensing: developing a strain sensor that outperforms traditional strain gauges, while maintaining the same form factor.
NATUrAL SYSTEMS - ANIMALS
CHEWING FOOD
Why do we eat the way we do ?
The chewing frequencies of terrestrial mammals are bounded by simple physical laws, imposed by jaw muscle actuation and by saliva flow rate. Data can be directly analyzed from modern video-sharing websites.
The chewing frequencies of terrestrial mammals are bounded by simple physical laws, imposed by jaw muscle actuation and by saliva flow rate. Data can be directly analyzed from modern video-sharing websites.
Physics of chewing in terrestrial mammals pdf - supp. data - journal
E. Virot, G. Ma, C. Clanet, S. Jung. Scientific Reports 7, 43967 (2017)
E. Virot, G. Ma, C. Clanet, S. Jung. Scientific Reports 7, 43967 (2017)
JUMPING IN and OUT OF Water
How do animals jump out of water? How do birds plunge-dive into water?
Aquatic animals inspire the design of innovative bio-inspired robotics.
Aquatic animals inspire the design of innovative bio-inspired robotics.
Jumping dynamics of aquatic animals pdf - journal
B. Chang, J. Myeong, E. Virot, C. Clanet, H.-Y. Kim, S. Jung. Journal of the Royal Society Interface 16, 20190014 (2019)
Highlighted in: Eurekalert, Engineering & Technology
How localized force spreads on elastic contour feathers pdf - journal
K. Bhar, B. Chang, E. Virot, L. Straker, H. Kang, R. Paris, C. Clanet, S. Jung. Journal of the Royal Society Interface, 16, 20190267 (2019)
B. Chang, J. Myeong, E. Virot, C. Clanet, H.-Y. Kim, S. Jung. Journal of the Royal Society Interface 16, 20190014 (2019)
Highlighted in: Eurekalert, Engineering & Technology
How localized force spreads on elastic contour feathers pdf - journal
K. Bhar, B. Chang, E. Virot, L. Straker, H. Kang, R. Paris, C. Clanet, S. Jung. Journal of the Royal Society Interface, 16, 20190267 (2019)
PUMPING BLOOD and SniFFING AIR
In multicellular organisms such as humans, active devices are necessary to guarantee uniform access to oxygen for cells, and efficient elimination of wastes. Soft pumps such as the heart or the respiratory system are evolutionary innovations that solve this problem.
Elastohydrodynamic scaling law for heart rates pdf - journal
E. Virot, V. Spandan, L. Niu, W. van Rees, L. Mahadevan. Physical Review Letters 125, 058102 (2020)
Sniffing speeds up chemical detection by controlling airflows near sensors pdf - journal
T. L. Spencer, A. Clark, J. Fonollosa, E. Virot, D. L. Hu. Nature Communication 12 1232 (2021)
Microchannel measurements of viscosity for both gases and liquids pdf - journal
K. Shiba, G. Li, E. Virot, G. Yoshikawa, D. A. Weitz. Lab on a Chip 21, 2805 (2021)
Elastohydrodynamic scaling law for heart rates pdf - journal
E. Virot, V. Spandan, L. Niu, W. van Rees, L. Mahadevan. Physical Review Letters 125, 058102 (2020)
Sniffing speeds up chemical detection by controlling airflows near sensors pdf - journal
T. L. Spencer, A. Clark, J. Fonollosa, E. Virot, D. L. Hu. Nature Communication 12 1232 (2021)
Microchannel measurements of viscosity for both gases and liquids pdf - journal
K. Shiba, G. Li, E. Virot, G. Yoshikawa, D. A. Weitz. Lab on a Chip 21, 2805 (2021)
Natural SysTems - PLAnTS
Trees in STORMS
Trees of different ages and species break at approximately the same wind speeds.
We address this curious observation with a minimal set of ingredients : tree allometry, linear elasticity, brittle fracture and air drag.
We address this curious observation with a minimal set of ingredients : tree allometry, linear elasticity, brittle fracture and air drag.
[Editor's suggestion] Critical wind speed at which trees break pdf - journal
E. Virot, A. Ponomarenko, E. Dehandschoewercker, D. Quéré, C. Clanet. Physical Review E 93, 023001 (2016)
Highlighted in: Science, Nature Physics, Scientific American, Physics Today, ...
E. Virot, A. Ponomarenko, E. Dehandschoewercker, D. Quéré, C. Clanet. Physical Review E 93, 023001 (2016)
Highlighted in: Science, Nature Physics, Scientific American, Physics Today, ...
EXPLOSION OF POPCORN
A bursting piece of popcorn reminds fracture-based and muscle-based rapid motions found in the plant & animal kingdoms.
Popcorn is a great messenger for scientific education, throughout all disciplinary fields.
Popcorn is a great messenger for scientific education, throughout all disciplinary fields.
[Cover] Popcorn: critical temperature, jump and sound pdf - supp. data - journal
E. Virot, A. Ponomarenko. Journal of the Royal Society Interface 12, 20141247 (2015)
Highlighted in: Science, Scientific American, Physics Today, NY Times, BBC News, ...
E. Virot, A. Ponomarenko. Journal of the Royal Society Interface 12, 20141247 (2015)
Highlighted in: Science, Scientific American, Physics Today, NY Times, BBC News, ...
