Complex Fluids and Instabilities Group




Michel Bouthier

Pierre Carlès

Paul Collini

Joel Chaskalovic

Cedric Croizet

Nathalie Delprat

Jean-Sylvestre Darrozès

Badaoui El Mabsout

Renée Gatignol

Daniel Gintz

Christophe Josserand

Pierre-Yves Lagrée

Lise Lamoureux

Daniel Lhuillier

Roger Prud'homme

Arnaud Monavon

Maurice Rossi, group vice-director.

Lydie Staron

Jacques Thévenin

Stéphane Zaleski, group director.

Complexity in fluid flow


Fluid mechanics opens on problems of ever increasing complexity . Complexity may arise because the Navier-Stokes equation, although deceiptively simple engenders ever more complex solutions such as contorted vortical flows. Hydrodynamic instabilities occur in a bewildering variety of symmetries and mechanisms.

When capillarity and interfaces are added the whole complex phenomenology of droplets and bubbles is obtained. Large numbers of droplet and bubbles, or solid particles, create an additional layer of complexity as in atomizing jets and sprays or sedimenting flows. Eventually, living systems offer breathtaking complexity .

Most of the research in the group is curiosity driven. Nevertheless, innumerable areas of target-oriented research are based on the Fluid Mechanics of Complex Flows. A common theme in the group is to treat the resulting complexity as a bona fide scientific inquiry, in line with the currently hot topics in the international community of theoretical physics, fluid mechanics and applied mathematics.

d'Alembert Institute

The complex fluid and instabilities group is one of the five groups of the Institut Jean Le Rond d'Alembert, which came into existence on January 1, 2007 . The Institute is a laboratory of University Pierre et Marie Curie . It is sponsored by the National Center for Scientific Research (CNRS) .

Laboratoire de Modélisation en Mécanique

Most of the members of the group originate from Laboratoire de Modelisation en Mecanique which went out of existence on December 31, 2006.


The group is located in Tower 55-65, 4th and 5th floor, on Campus Jussieu