ESPCI web site
PMMH’s weekly seminar is held every Friday at 11 am (map)
Stéphane Perrard
Etienne Reyssat
Virgile Thiévenaz
PMMH
BARRE CASSAN
BAT A 1ER ETAGE CASE 18
7 QUAI SAINT BERNARD
75005 PARIS
France
Tel : (33) 1 40 79 45 22
Séminaire PMMH - Xanthippi Markenscoff (University of California San Diego)
Instabilities of nucleation and growth of a phase change defect
Department of Mechanical and Aerospace Engineering
University of California San Diego
La Jolla, CA 92093-0411
Abstract
A defect of phase change in density and moduli modeled as a self-similarly expanding Eshelby ellipsoidal inclusion can nucleate and grow under a critical loading. The ellipsoid possesses the “lacuna” property with the particle velocity vanishing in the interior domain, which allows the constant stress Eshelby property and the inclusion to grow as a whole. The energetics for nucleation and growth are derived from the energy-momentum tensor and first principles. The solution obtains the flow of energies across a moving phase boundary at the balancing of which (which expresses the vanishing of the M integral) the interface presents no obstacle, and, at that critical loading, an arbitrarily small phase change defect nucleates and grows at constant potential energy. By breaking the symmetry it expands as a flattened Eshelby ellipsoidal inclusion, which minimizes the losses to move the phase boundary, and the critical pressure is obtained for nucleation and growth of an inhomogeneous inclusion under high pressure. The solution explains the generation of a shear seismic source with Double Couple radiation in deep earthquakes and the generation of failure waves with a zone of micro-fractures (in tension) under compressive loading in lima glass. The methodology has wider applications to a range of physical phenomena, such as amorphization defects and defects in alloys, planetary impacts, etc.
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Seminars (11)
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Séminaire PMMH - Anaïs Gauthier, IPR Rennes, CNRS
Vendredi 19 septembre de 11h00 à 12h00 - Salle réunion PMMH 1
Capillary choreographies at low-Friction interfaces
From Leidenfrost baths to soap films The motion of millimetre-sized objects trapped at the liquid-air interfaces is a familiar phenomenon, seen in the clumping of cereals in a bowl or of bubbles at the surface of a sparkling drink. The deformation of the interface typically generates attractive forces between the (…) -
Séminaire PMMH – Antoine Deblais (U. Amsterdam)
Vendredi 26 septembre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Antoine Sanner (ETH Zürich)
Vendredi 3 octobre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Florence Bertails-Descoubes (INRIA, Grenoble) & Sébastien Neukirch (∂Alembert)
Vendredi 10 octobre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Marie Poulain-Zarcos (LFMA, Lyon)
Vendredi 17 octobre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Christina Kurzthaler (MPI Dresden)
Vendredi 7 novembre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Romain Mari (LiPhy, Grenoble)
Vendredi 14 novembre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Christiana Mavroyiakoumou (Oxford University)
Vendredi 21 novembre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Paddy Royall (Gulliver, ESPCI Paris)
Vendredi 28 novembre de 11h00 à 12h00 - Salle réunion PMMH 1
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Séminaire PMMH – Francesca Borghi (U. Milan)
Vendredi 5 décembre de 11h00 à 12h00 - Salle réunion PMMH 1
The audience is composed of people with rather heterogeneous backgrounds including specialists in solids, fluids, granular flows, statistical physics... so the idea is to keep your talk understandable by people not necessarily working in your field... The seminar time slot runs from 11am to noon so the best is to make the talk last around 45 minutes to leave some time for discussion.
- Séminaires ESPCI-ENS de biophysique
- Séminaires du Département de Physique de l’ENS
- Séminaires du Laboratoire d’Hydrodynamique de l’X
- Séminaire de Mécanique d’Orsay (page web FAST)
- Séminaire de Mécanique d’Orsay (page web LIMSI)
- Séminaire de Mécanique des Fluides de l’Institut Jean le Rond d’Alembert
- Séminaires du laboratoire MSC, Paris VII
- Séminaires Gulliver
Link to cofee seminar (internal, every Thursday)
