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.
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.
- This minicourse is part of the summer school program: 100 years of cascades, organized in the framework of the thematic semester in turbulence.
- For the lectures held in Valrose, attendance is open to anyone interested.