Flow Patterns and Heat Transfer in a Cylindrical Annulus under 1g and low-g Conditions: Theory and Simulation

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From: Microgravity - Science and Technology(Vol. 30, Issue 5)
Publisher: Springer
Document Type: Report
Length: 221 words

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Byline: Antoine Meyer (1), Olivier Crumeyrolle (1), Innocent Mutabazi (1), Martin Meier (2), Marcel Jongmanns (2), Marie-Charlotte Renoult (1), Torsten Seelig (2), Christoph Egbers (2) Keywords: Thermal convection; Dielectrophoretic force; Microgravity; Cylindrical annulus; Heat transfer; Stability analysis Abstract: A dielectric fluid is confined in a stationary vertical cylindrical annulus. A temperature difference is applied between the two cylinders, as well as an alternating electric potential. This configuration creates an active force called dielectrophoretic force, which acts as a thermal buoyancy force. Different axial gravity intensities are considered, so that two thermal buoyancies will affect the flow: the thermoelectric buoyancy intervenes in the radial direction and the Archimedean buoyancy acts in the axial direction. Linear stability analysis and direct numerical simulation are performed following experimental research that has been performed during parabolic flight campaigns. Author Affiliation: (1) Normandie Universite, UNIHAVRE, CNRS UMR 6294, Laboratoire Ondes et Milieux Complexes, 53, rue de Prony, Le Havre, 76058, France (2) 0000 0001 2188 0404, grid.8842.6, Lehrstuhl Aerodynamik und Stromungslehre, Brandenburgische Technische Universitat Cottbus-Senftenberg, Siemens - Halske - Ring, 14, 03046, Cottbus, Germany Article History: Registration Date: 19/06/2018 Received Date: 23/01/2018 Accepted Date: 19/06/2018 Online Date: 28/06/2018 Article note: This article belongs to the Topical Collection: Interdisciplinary Science Challenges for Gravity Dependent Phenomena in Physical and Biological Systems Guest Editors: Jens Hauslage, Ruth Hemmersbach, Valentina Shevtsova

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Gale Document Number: GALE|A560182089