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Heat balance in levitation melting - Sample cooling by forced Helium gas convection

Lohöfer, Georg and Schneider, Stephan (2015) Heat balance in levitation melting - Sample cooling by forced Helium gas convection. High Temperatures-High Pressures (44), pp. 429-450. Old City Publishing. ISSN 0018-1544

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Abstract

Electromagnetic levitation melting is a containerless processing technique for liquid metals requiring non-contact diagnostic tools. In order to properly perform such experiments, a precise knowledge of the temperature-time behaviour of the metal sample resulting from the heat balance between its heating and cooling during the processing is a prerequisite. In two preceding papers we provided the necessary theoretical background for the inductive heat input by the high frequency magnetic levitation field and the heat loss due to radiation and heat conduction through a surrounding process gas atmosphere and defined the set of experiments needed for obtaining the key parameters of the thermal model. In the present paper we extend the previous work by investigating theoretically and, at hand of further tests under microgravity, experimentally the influence of the sample cooling by forced gas convection at low Péclet number in a surrounding Helium atmosphere.

Item URL in elib:https://elib.dlr.de/102371/
Document Type:Article
Title:Heat balance in levitation melting - Sample cooling by forced Helium gas convection
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lohöfer, GeorgGeorg.Lohoefer (at) dlr.deUNSPECIFIED
Schneider, Stephanstephan.schneider (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:High Temperatures-High Pressures
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Page Range:pp. 429-450
Publisher:Old City Publishing
ISSN:0018-1544
Status:Published
Keywords:Electromagnetic levitation, containerless processing, microgravity, gas cooling, forced convection
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Lohöfer, Georg
Deposited On:25 Jan 2016 06:25
Last Modified:06 Sep 2019 15:20

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