Professor GertJan van Heijst

Professor Pierre Suquet
Laboratoire de Mécanique et d’Acoustique
31 chemin Joseph Aiguier
13402 Marseille Cedex 20

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List of EUROMECH Colloquia in 2014

  • [554] Dynamics of capsules, vesicles and cells in flow

    Date: 15 July 2014 - 18 July 2014 
    Location: Université de Technologie de Compiègne, France


    Dr. Anne-Virginie Salsac
    Biomechanics and Bioengineering
    Université de Technologie de
    BP 30529
    60205 Compiègne cedex


    Dr. Mark Blythe
    University of East Anglia
    Norwich, UK


     Encapsulated soft particles are commonly encountered in nature (seeds, cells, phospholipid vesicles) and in different industrial applications (biotechnology, pharmacology, cosmetics, food industry). The role of encapsulation is to protect a substance with a solid envelope. It avoids its dispersion in the ambient environment or its degradation in contact with it. The membrane may be a lipid bilayer (vesicles), a reticulated membrane with elastic properties (artificial capsules) or a lipid bilayer connected to a cytoskeleton (cells).

    There are many open issues regarding the mechanics of capsules/vesicles/cells:

    The characterization of their mechanical properties is difficult owing to their small size and fragility.

    The role of the fabrication process on the physical and mechanical properties of artificial capsules or vesicles (shape, size, degree of reticulation, membrane mechanical properties) remains to be better understood. Controlling the membrane properties is essential to optimize the design and production of specific particles for each application.

    When suspended in an external flowing fluid, capsules/vesicles/cells deform in a complex fashion and may eventually burst (the breakup is to be induced or prevented depending on the application). Relatively few experimental studies of these phenomena exist, but recent progress in microtechnology has opened new perspectives. Correlatively, the theoretical study of the motion and deformation of these particles is a complex fluid-structure interaction problem. The present numerical models all include simplifying assumptions, the relevance of which has yet to be established.

    The occasion of the present Symposium will allow a unique analysis of the similarities and differences of the mechanics, physics and biology of capsules, vesicles and cells. It will provide the opportunity to confront the various approaches used to study these deforming particles and establish some guidelines for future research.

  • [557] Fluid Mechanics of Collective Behaviour across Scales

    Date: 22 September 2014 - 26 September 2014 
    Location: Zurich, Switzerland


    Prof. Petros Koumoutsakos
    Chair in Computational Science
    ETH Zurich
    Clausiusstrasse 33 CLT,
    F12 CH-8092, Zurich, Switzerland

    Ph: +41446325258



    Prof. J.L. van Leeuwen
    Head of the Experimental Zoology Group 

    Department of Animal Sciences 

    Wageningen University
    Zodiac, Building number 122
    De Elst 1, 6708 WD Wageningen
The Netherlands 

    Ph: +31-(0)317482267; 

    Fax: +31-(0)317483955

    Dr. Guy Theraulaz
    Directeur de Recherches CNRS
    Centre de Recherches sur la Cognition Animale
    CNRS UMR 5169
    Universite Paul Sabatier
    118, route de Narbonne
    31062 Toulouse Cedex 04, France

    Ph: +33.
    Fax : +33.


  • [561] Dimensionality in Turbulence

    Date: 19 May 2014 - 21 May 2014 
    Location: Coventry University Technology Park, UK


    Prof. Alban Pothérat
    Professor of fluid mechanics
    Applied Mathematics Research Centre
    Coventry University
    Priory Street, Coventry CV1 5FB, UK

    Ph: +44(0) 2477 65 88 65



    Prof. GertJan van Heijst
    Professor of fluid mechanics
    Department of Applied Physics
    Eindhoven University of Technology
    P.O. Box 513, 5600 MB Eindhoven, The Netherlands

    Ph: +31 40-247 2722

    Dr. Nicolas Plihon
    CNRS researcher
    ENS Lyon . Physics Laboratory
    46 Allée d'Italie - 69007 Lyon

    Ph: +33(0)4 72 72 84 72


  • [563] Generalized Continua and their application to the design of composites and metamaterials

    Date: 17 March 2014 - 21 March 2014 
    Location: Cisterna di Latina (Rome), Italy


    Prof. Francesco dell’Isola
    Università di Roma La Sapienza
    Dipartimento di Ingegneria Strutturale e Geotecnica
    Via Eudossiana 18
    00184 Rome, Italy
    Ph: +39 06 90286784


    Prof. Samuel Forest
    Centre des Matériaux - MINES Paristech
    CNRS UMR 7633
    10 rue Henri Desbruères, BP 87
    F-91003 Evry Cedex, France
    Ph: +33 01 6076 3051
    Fax: +33 01 6076 3150



    Main Topics :

    • General concepts for second and higher gradient media
    • Phenomenology of existing and designed composites and metamaterials
    • Homogenization techniques and related numerical and mathematical problems
    • Beams and plates constituted by metamaterials
    • Strain and stress localization phenomena
    • Dynamic behavior of metamaterials and composites
    • Acoustic properties of metamaterials and composites
    • Generalized continua in Biomechanics and mechanics of growing tissues
    • Damage and fracture in generalized continua
  • [565] Subcritical transition to turbulence

    Date: 6 May 2014 - 9 May 2014 
    Location: Cargese, Corsica


    Dr. Yohann DUGUET
    Université Paris-Sud,
    F-91403 Orsay, France
    Ph: + 33 1 6985 8072
    Fax: + 33 1 6985 8088



    Dr. José Eduardo WESFREID
    rue Vauquelin,
    F-75231 Paris, France,
    Ph: +33140794445,




     Transition to turbulence in fluids remains one of the unsolved problems of modern mechanics, despite its importance in various fields of engineering ranging from aerodynamics to oil transport. An especially challenging topic is the question of "subcritical" transition in wall-bounded flows, i.e. when the base flow is linearly stable and classical stability analysis fails at explaining the coherent structures commonly observed in experiments and in simulations. This concerns most flows in simple geometries such as pipes, ducts, channel and also boundary layer flows. This special problem lies at the crossroad between hydrodynamics, chaos theory and statistical physics. Specific cutting-edge experimental and/or numerical strategies have been been developed in the last decade. New questions arise as to how this problem extends to non-Newtonian rheologies, or how to control or delay this transition in realistic situations.
    The colloquium will feature individual contributions, poster sessions and round tables for discussions.

    Non-exhaustive list of topics :

    - Spatiotemporal aspects of subcritical transition: large-scale pattern formation, intermittency, lifetimes measurements, experimental techniques
    - Dynamical systems approach to transitional flows: exact coherent structures, unstable periodic orbits, edge states, chaotic saddles, related numerical methods
    - Localised states in fluids
    - Low-dimensional modelling strategies
    - Non-Newtonian rheologies
    - Nonlinear control strategies
    - Cross-disciplinary analogies

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