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Accueil du site > Séminaires > Archives séminaires > Séminaires 2020 > Séminaire MSC. 9 Mars 2020. Michiko Shimokawa (Fukuoka Institute of Technology, Japan). "Mode Selection of Breakup of Falling Droplet in Miscible Solution.".
Séminaire MSC. 9 Mars 2020. Michiko Shimokawa (Fukuoka Institute of Technology, Japan). "Mode Selection of Breakup of Falling Droplet in Miscible Solution."
Sauf mention contraire, les séminaires et les soutenances se déroulent à 11h30 en salle 454A du bâtiment Condorcet.
Mode Selection of Breakup of Falling Droplet in Miscible Solution
Michiko Shimokawa, Fukuoka Institute of Technology, Japan
Abstract : When a droplet with a relatively high density falls into a miscible solution with a relatively low density, the droplet breaks up spontaneously. We investigated the number m of breakup in experiments with several density differences Δρ between two solutions, viscosities μ, and droplet radii r. The mode number m has a distribution even under the same experimental conditions. We propose a simple model of mode selection based on the linear Rayleigh-Taylor instability and the growing radius of a vortex ring deformed from the droplet. The model provides the probability distribution P(m) and a relationship between the nondimensional parameter G∝Δρgr3/μ2 and the average value of m, which are consistent with experimental results. This study is collaborated with Prof. Sakaguchi in Kyushu University.
Contact : Équipe séminaires / Seminar team - Published on / Publié le 2 mars 2020
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