NUMEV seminar: "Atomisation and aerosolisation: a fluid mechanics perspective."

  • Category : Seminar
  • Dates: January 6, 2023
  • Timetable : From 11am to 12pm
  • Location: Campus St Priest, bât 2, amphithéâtre Moreau - 860, rue de St Priest, 34090 Montpellier.

By Stéphane Zaleski, Sorbonne University, Paris.

The NUMEV Seminars are open to a wide audience of students and researchers from all disciplines, who wish to learn more about the current research areas of the NUMEV-MIPS (Mathematics, Informatics, Physics and Systems) community or about the possibilities to develop their skills and know-how.


Atomisation, or aerosolisation as it is known in Covid studies, is a striking example of the huge complexity of multiphase flow turbulence. The theory of atomisation starts with the consideration of Kelvin-Helmholtz instabilities. To make these theories predictive of the length scales and frequencies observed in experiment is surprisingly difficult task and is still being investigated in some aspects in full three-dimensional simulations.

In recent years numerical simulations and experiments have illustrated the important role played by thin liquid sheets and ligaments. Moreover the importance of aerosolisation phenomena in respiratory disease transmission has motivated specific experiments such as those of the " cough machine ". In that setup the impulsive air flow over a thin liquid layer can be investigated. This allows to study the influence of the liquid viscosity on sheet thickness and droplet sizes.