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Residual fluid flow in liquid metallic droplets processed in the space station electromagnetic levitation facility

Lohöfer, Georg and Xiao, Xiao (2022) Residual fluid flow in liquid metallic droplets processed in the space station electromagnetic levitation facility. Physics of Fluids, 34 (077114). American Institute of Physics (AIP). doi: 10.1063/5.0096768. ISSN 1070-6631.

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Abstract

The electromagnetic levitation facility on board the International Space Station is used to investigate contactlessly and without gravityinduced convection thermophysical properties and microstructure formations of hot, highly reactive metallic liquids. Despite the widely forceless microgravity environment, the small remaining electromagnetic levitation forces still drive residual convective fluid flows inside the levitated droplet, which may disturb the measurements. Thus, the knowledge of the flow velocities is critical to interpret and evaluate the measurement results. In previous investigations of Xiao and co-workers, a great amount of numerical magneto hydrodynamics calculations were performed with many different material properties and source force terms. The results for the maximum flow velocities hereof were analytically characterized by surrogate models consisting of multi-dimensional, high-order regression analysis. The present work offers another analytical description of these numerical results. Derived based on physical relations, it provides a simpler and physically more illustrative presentation.

Item URL in elib:https://elib.dlr.de/187471/
Document Type:Article
Title:Residual fluid flow in liquid metallic droplets processed in the space station electromagnetic levitation facility
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lohöfer, GeorgUNSPECIFIEDUNSPECIFIED
Xiao, XiaoUNSPECIFIEDUNSPECIFIED
Date:2022
Journal or Publication Title:Physics of Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:34
DOI:10.1063/5.0096768
Publisher:American Institute of Physics (AIP)
ISSN:1070-6631
Status:Published
Keywords:Electromagnetic levitation, microgravity, convective fluid flow, magneto hydrodynamics, physical model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Lohöfer, Georg
Deposited On:24 Aug 2022 14:52
Last Modified:26 Aug 2022 11:22

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