Interfacial phenomena in immiscible liquids subjected to vibrations in microgravity

Salgado Sanchez, Pablo and Yasnou, V. and Gaponenko, Y. and Mialdun, A. and Porter, Jeffrey Brent and Shevtsova, V. (2019). Interfacial phenomena in immiscible liquids subjected to vibrations in microgravity. "Journal of Fluid Mechanics", v. 865 ; pp. 850-883. ISSN 0022-1120. https://doi.org/10.1017/jfm.2019.88.

Description

Title: Interfacial phenomena in immiscible liquids subjected to vibrations in microgravity
Author/s:
  • Salgado Sanchez, Pablo
  • Yasnou, V.
  • Gaponenko, Y.
  • Mialdun, A.
  • Porter, Jeffrey Brent
  • Shevtsova, V.
Item Type: Article
Título de Revista/Publicación: Journal of Fluid Mechanics
Date: 2019
ISSN: 0022-1120
Volume: 865
Subjects:
Freetext Keywords: Drops; instability; waves/free-surface flows
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We consider the response to periodic forcing between 5 Hz and 50 Hz of an interface separating immiscible fluids under the microgravity conditions of a parabolic flight. Two pairs of liquids with viscosity ratios differing by one order of magnitude are investigated. By combining experimental data with numerical simulations, we describe a variety of dynamics including harmonic and subharmonic (Faraday) waves, frozen waves and drop ejection, determining their thresholds and scaling properties when possible. Interaction between these various modes is facilitated in microgravity by the relative ease with which the interface can move, altering its orientation with respect to the forcing axis. The effects of key factors controlling pattern selection are analysed, including vibrational forcing, viscosity ratio, finite-size effects and residual gravity. Complex behaviour often arises with features on several spatial scales, such as Faraday waves excited on the interface of a larger columnar structure that develops due to the frozen wave instability – this type of state was previously seen in miscible fluid experiments but is described for the first time here in the immiscible case.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainESP2015-70458-PUnspecifiedUnspecifiedControl de fluidos vibrados en microgravedad

More information

Item ID: 67019
DC Identifier: https://oa.upm.es/67019/
OAI Identifier: oai:oa.upm.es:67019
DOI: 10.1017/jfm.2019.88
Official URL: https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/interfacial-phenomena-in-immiscible-liquids-subjected-to-vibrations-in-microgravity/B29F7FCF693EB5C57C4DB17A6F70A414
Deposited by: Memoria Investigacion
Deposited on: 02 Jun 2021 08:24
Last Modified: 02 Jun 2021 08:24
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