On the influence of gravity on particle accumulation structures in high aspect-ratio liquid bridges
Capobianchi, Paolo and Lappa, Marcello (2021) On the influence of gravity on particle accumulation structures in high aspect-ratio liquid bridges. Journal of Fluid Mechanics, 908. A29. ISSN 0022-1120 (https://doi.org/10.1017/jfm.2020.882)
Preview |
Text.
Filename: Capobianchi_Lappa_JFM_2020_On_the_influence_of_gravity_on_particle_accumulation_structures.pdf
Accepted Author Manuscript Download (2MB)| Preview |
Abstract
This analysis focuses on the properties of the so-called particle accumulation structures (PAS) in non-cylindrical liquid bridges in normal gravity conditions. In this regard, it follows and integrates the line of inquiry started in Lappa (J. Fluid Mech., vol. 726, 2013, 160) where the main focus was on the effect of high-frequency vibrations. After the discovery (passed almost unnoticed) of a structure (Sasaki et al. Trans. Japan Soc. Mech. Engrs B, vol. 70, 2004) that seems to escape a simple classification on the basis of existing categorizations or paradigms for this type of phenomena, dedicated numerical simulations are carried out in the framework of an integrated Eulerian-Lagrangian approach. Conditions are considered corresponding to isodense and non-isodense particles in a liquid bridge with high aspect ratio, high Prandtl number fluid and hydrostatically deformed interface. Special attention is paid to the very elusive azimuthal wavenumber, for which PAS seem to be possible only in a very restricted range of Marangoni numbers. Two distinct families of particle attractors are identified, which coexist in the space of parameters as multiple solutions. We show that the key ingredient needed to unravel the related basins of attraction is the effect of gravity on particles, which may therefore be regarded as an additional mechanism responsible for the formation of these structures in terrestrial liquid bridges.
ORCID iDs
Capobianchi, Paolo ORCID: https://orcid.org/0000-0003-4253-7853 and Lappa, Marcello ORCID: https://orcid.org/0000-0002-0835-3420;-
-
Item type: Article ID code: 74284 Dates: DateEvent10 February 2021Published10 December 2020Published Online12 October 2020AcceptedSubjects: Science > Physics Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Strategic Research Themes > Ocean, Air and SpaceDepositing user: Pure Administrator Date deposited: 15 Oct 2020 14:22 Last modified: 06 Sep 2024 00:59 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/74284