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Accueil du site > Séminaires > Archives séminaires > Séminaires 2021 > MSC Visio-Seminar. October 4th 2021. Stéphane Perrard (LPENS, ENS) : "Bubble break up in turbulent flows".

MSC Visio-Seminar. October 4th 2021. Stéphane Perrard (LPENS, ENS) : "Bubble break up in turbulent flows"

Sauf mention contraire, les séminaires et les soutenances se déroulent à 11h30 en salle 454A du bâtiment Condorcet.

There will be a live diffusion with Zoom.

Monday October 4th, 11h30

Contact Michael Berhanu to attend the visio-seminar

Bubble break up in turbulent flows

Stéphane Perrard

Laboratoire de Physique de l’école Normale Supérieure, Paris Science Lettres

The transfert of CO2 from the atmosphere to the ocean is estimated to originate at 40% from wave breaking in open seas. Indeed, when a wave breaks, it traps large volumes of air that will fragment and generate submillimetric bubbles. The small bubbles in particular rise slower to the surface, and dissolve faster into the ocean. However, the distribution of bubble size, in particular for submillimetric diameters, remains an open question. In collaboration with L. Deike, we have developed a dual approach, experimental & numerical to identify the physical processes at play in bubble fragmentation. To do so, we inject a controlled volume of air within a turbulent flow, and we track the fragmentation dynamics. Combining experimental & numerical data, I will present how we developed a model to explain the distribution of small bubble size in turbulent flows.

Contact : Équipe séminaires / Seminar team - Published on / Publié le 23 septembre 2021

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