Title :

How to tame a free non-laminar Savart sheet into individual jets?

Author(s) :

Oulded Taled Salah, Sofiene [Auteur]
Group for Research and Applications in Statistical Physics [GRASP]
Université de Liège
Chouk, Ghada [Auteur]
Duchesne, Alexis [Auteur correspondant]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
de Cock, Nicolas [Auteur]
Université de Liège
Abrougui, Khaoula [Auteur]
Lebeau, Frédéric [Auteur]
Université de Liège
Dorbolo, Stéphane [Auteur]
Group for Research and Applications in Statistical Physics [GRASP]

Journal title :

International Journal of Multiphase Flow

Pages :

104032

Publisher :

Elsevier

Publication date :

2022

ISSN :

0301-9322

English keyword(s) :

Savart sheet
Free surface flow
Jets
Droplets

HAL domain(s) :

Sciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph]

English abstract : [en]

In this article, we study the division of a non-laminar Savart sheet into individual jets by mean of local disturbances. We paint a precise portrait of a free non-laminar Savart sheet formed by the vertical impact of a jet ...
Show more >In this article, we study the division of a non-laminar Savart sheet into individual jets by mean of local disturbances. We paint a precise portrait of a free non-laminar Savart sheet formed by the vertical impact of a jet on a horizontal disk, its evolution in the air and its break up.We then generate local disturbances, outside of the disk circumference, triggered by N radial triangular prisms placed directly in the non-laminar sheet. We show that, under given flow conditions and geometrical parameters for the triangular prisms, the sheet splits into individual jets. Depending on the incoming flow rate Q and on the geometry of the prism, the number of jets n can be either stable (and equal to N jets) or variable due to elastic coalescing of neighboring jets. Phase diagrams (Q, n) are obtained from experimental measurements for different geometrical parameters of triangular prisms. A semi-empirical model, which explains the generation of individual jets, is established. Finally, we characterize the droplets emitted from the non-laminar Savart sheet and from the jets in terms of diameters.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

Submission date :

2024-10-29T03:19:42Z