Education

Dr Guédra’s main topics of research concern the study of nonlinear oscillations and instabilities in fluid media. He received his PhD degree in Acoustics from the Le Mans University in 2012 for his works on self-sustained thermoacoustic oscillations. After his PhD, he joined a research team of the Institut Jean le Rond d’Alembert of the Pierre and Marie Curie University (Paris 6) as a postdoctoral fellow (2013-2014, Plan Cancer grant NABUCCO), where he conducted theoretical works on polymer-coated nanodroplets for biomedical research. Since february 2015, he is currently a postdoctoral researcher in the “Coupling and Control” group of the LabTAU U1032 (ANR grant Ulysse, ANR grant CARIBBBOU).

Research

Dr Guédra is working on different aspects of nonlinear bubble dynamics using both experimental and theoretical approaches. He recently proposed asymptotic analyses of the oscillations of dual-frequency excited bubbles and interacting bubbles by means of perturbation methods. His current studies focus on the nonspherical oscillations of micro-sized bubbles exhibiting particular characteristics (unstable transition, nonlinear saturation, mode coupling), developing experiments for time-resolved bubble dynamics (laser-induced cavitation, acoustic levitation, high-speed camera) and asymptotic theory.

Co-author of 11 articles in peer-reviewed journals, 6 publications in peer-reviewed proceedings, 20 communications in conferences, 60 collected citations, h-index 5.

5-selected publications in peer-reviewed journals:

  • [1] A derivation of the stable cavitation threshold accounting for bubble-bubble interactions. M Guédra, C Cornu, C Inserra, Ultrasonics Sonochemistry, 38: 168-173, 2017.
  • [2] Experimental evidence of nonlinear interactions between spherical and nonspherical oscillations of microbubbles. M Guédra, C Inserra, C Mauger, B Gilles, Physical Review E, 94: 053115, 2016.
  • [3] A model for acoustic vaporization of encapsulated droplets. M Guédra, F. Coulouvrat, Journal of the Acoustical Society of America, 138, 3656-3667, 2015.
  • [4] Influence of shell compressibility on the ultrasonic properties of polydispersed suspensions of nanometric encapsulated droplets. M Guédra, T Valier-Brasier, J-M Conoir, F Coulouvrat, K Astafyeva, J-L Thomas. Journal of the Acoustical Society of America, 135, 1044-1055, 2014.
  • [5] Experimental and theoretical study of a standing wave thermoacoustic engine above onset of self-oscillations. M Guédra, G Penelet, P Lotton. Journal of Applied Physics, 115: 024504, 2014.