Lundi 14 septembre 2026 à 14h00, salle des séminaires IRPHE
Abstract: Multiphase and dispersed-phase flows display rich transport phenomena that arise from the coupling between flow structures, interfaces, and immersed objects. In this talk, I will present two numerical studies that explore how such couplings affect transport across scales and flow regimes.
The first part focuses on heat transfer during the melting of an ice disk in the presence of an external oscillatory flow. I will show how the interplay between advection and diffusion within the boundary layer govern the melting dynamics, resulting in two distinct regimes at slow and fast oscillations.
In the second part, I will discuss the transport of long, inertialess rods in idealised turbulent conditions, with a focus on long-time dispersion. Here, the geometry and the range of scales spanned by the rods strongly affect their transport properties, reflected in velocity correlations, tumbling dynamics, and effective diffusion.
Sofia Angriman, postdoctoral researcher at the Institut de Physique de Nice