Vibroequilibria in microgravity: Comparison of experiments and theory

Salgado Sanchez, Pablo and Fernandez Fraile, Jose Javier and Tinao Perez-Miravete, Ignacio and Porter, Jeffrey Brent (2019). Vibroequilibria in microgravity: Comparison of experiments and theory. "Physical Review E", v. 100 ; ISSN 2470-0045. https://doi.org/10.1103/PhysRevE.100.063103.

Description

Title: Vibroequilibria in microgravity: Comparison of experiments and theory
Author/s:
  • Salgado Sanchez, Pablo
  • Fernandez Fraile, Jose Javier
  • Tinao Perez-Miravete, Ignacio
  • Porter, Jeffrey Brent
Item Type: Article
Título de Revista/Publicación: Physical Review E
Date: December 2019
ISSN: 2470-0045
Volume: 100
Subjects:
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

Experiments on vibrated fluids confined in cylindrical and cuboidal containers were performed under the reduced gravity conditions of a parabolic flight. The results constitute a systematic quantitative investigation of the vibroequilibria effect, which refers to the reorientation of vibrated fluids in response to the inhomogeneous oscillatory velocity field and the accompanying dynamic pressure. This effect is amplified in microgravity where the restoring force of gravity is small or absent. Here the vibrations are transmitted via a pair of piezoelectric ceramics and a cantilever beam, excited in a resonant mode. The first and second resonances exhibit different types of motion and lead to different types of vibroequilibria surfaces, one with a dip or crater in the interior and the other flattened compared to the unforced reference experiment. The general tendency for interfaces to orient more perpendicular, on average, to the vibrational axis is confirmed. In the case of water in a cuboidal container, a quantitative comparison is made with vibroequilibria theory and with direct simulations of the Navier-Stokes equations. The good agreement confirms the predictions of vibroequilibria theory and suggests the capacity of this phenomenon to manipulate and position fluids in space environments through the choice of frequency and resonant mode.

More information

Item ID: 67085
DC Identifier: https://oa.upm.es/67085/
OAI Identifier: oai:oa.upm.es:67085
DOI: 10.1103/PhysRevE.100.063103
Official URL: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.100.063103
Deposited by: Memoria Investigacion
Deposited on: 13 Oct 2021 08:10
Last Modified: 13 Oct 2021 08:10
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