Journal article
Direct numerical simulations of turbulent jets: vortex-interface-surfactant interactions
- Abstract:
- We study the effect of insoluble surfactants on the spatio-temporal evolution of turbulent jets. We use three-dimensional numerical simulations and employ an interfacetracking/level-set method that accounts for surfactant-induced Marangoni stresses. The present study builds on our previous work (Constante-Amores et al., 2021, J. Fluid Mech., 922, A6) in which we examined in detail the vortex-surface interaction in the absence of surfactants. Numerical solutions are obtained for a wide range of Weber and elasticity numbers in which vorticity production is generated by surface deformation and surfactantinduced Marangoni stresses. The present work demonstrates, for the first time, the crucial role of Marangoni stresses, brought about by surfactant concentration gradients, in the formation of coherent, hairpin-like vortex structures. These structures have a profound influence on the development of the three-dimensional interfacial dynamics. We also present theoretical expressions for the mechanisms that influence the rate of production of circulation in the presence of surfactants for a general, three-dimensional, two-phase flow and highlight the dominant contribution surfactant-induced Marangoni stresses.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Version of record, pdf, 1.9MB, Terms of use)
-
- Publisher copy:
- 10.1017/jfm.2022.1056
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Grant:
- EP/S029966/1
- EP/W016036/1
- Publisher:
- Cambridge University Press
- Journal:
- Journal of Fluid Mechanics More from this journal
- Volume:
- 955
- Article number:
- A42
- Publication date:
- 2023-01-24
- Acceptance date:
- 2022-12-07
- DOI:
- EISSN:
-
1469-7645
- ISSN:
-
0022-1120
- Language:
-
English
- Keywords:
- Pubs id:
-
1315656
- Local pid:
-
pubs:1315656
- Deposit date:
-
2022-12-20
Terms of use
- Copyright holder:
- Constante-Amores et al
- Copyright date:
- 2023
- Rights statement:
- © The Author(s), 2023. Published by Cambridge University Press. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record