Minicourse - Alessandra Lanotte

  • Research
Published on June 13, 2023 Updated on September 28, 2024
Dates

from June 26, 2023 to July 7, 2023

  • Lecture 1:  Mo, June 26.,  2pm  (Valrose, M37)
  • Lecture 2:  We,  June 28.,  9am (Valrose, Amphi M)
  • Lecture 3:  Th,  July 29.,   9am (Valrose, Amphi M)
Location

Campus Valrose

Valrose - Bâtiment M

Breakup of small particles in turbulent flows

The fragmentation of macroscopic solid object dispersed in gas or liquids is a phenomenon
of relevance for a broad variety of problems, from geophysics, to engineering and pharmaceutics.
It involves complicated microscopic effects, related to the simultaneous action of body forces,
hydrodynamic interactions and colloidal forces. In these two lectures, we will review some
theoretical approaches that drastically simplify the problem, and yet give interesting insights into
the statistics of the fragmentation process. Using Direct Numerical Simulations data, we focus on
dilute suspensions of small, spherical particles of variable inertia dispersed in laminar and turbulent
flows. We estimate of the rate at which they break, and contrast Eulerian and Lagrangian
approaches to the problem. We discuss how the distribution of turbulent velocity gradients impact
the breakup rate of suspended particles.