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Characteristics of a Magnetic Bulk Thermostat for Granular Gas Investigations in Microgravity

Adachi, Masato and Balter, Michael and Cheng, Xiang and Drescher, Jörg and Li, Xiaotian and Sperl, Matthias and Zhao, Shaofan and Yu, Peidong (2021) Characteristics of a Magnetic Bulk Thermostat for Granular Gas Investigations in Microgravity. Microgravity Science and Technology, 33 (11), pp. 1-12. Springer. doi: 10.1007/s12217-020-09853-5. ISSN 0938-0108.

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Official URL: https://doi.org/10.1007/s12217-020-09853-5

Abstract

A magnetic thermostat employing soft-ferromagnetic particles and a varying magnetic field has been developed to investigate ahomogeneous granular gas system in microgravity. While the thermostat’s mechanism of creating homogeneous distribution ofthe particles was shown earlier, its characteristics have not been understood well due to limited access to a microgravityenvironment. Therefore, a parametric study by numerical simulation based on the discrete element method is carried out in thispaper to evaluate effects of tunable parameters in the thermostat. The result shows the capability of the system and provides awide range of options and improvements for future experiments. Moreover, it predicts that the thermostat allows variation ofhomogeneity and excitation level of the granular gas just by changing the magnetic parameters without using any mechanicalmeans. In addition, the suggested improvement is experimentally implemented and evaluated in a drop tower test.

Item URL in elib:https://elib.dlr.de/140620/
Document Type:Article
Title:Characteristics of a Magnetic Bulk Thermostat for Granular Gas Investigations in Microgravity
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Adachi, MasatoDLRUNSPECIFIED
Balter, MichaelDLRUNSPECIFIED
Cheng, XiangCASTUNSPECIFIED
Drescher, Jörgjoerg.drescher (at) dlr.deUNSPECIFIED
Li, XiaotianCASTUNSPECIFIED
Sperl, MatthiasMatthias.Sperl (at) dlr.deUNSPECIFIED
Zhao, ShaofanCASTUNSPECIFIED
Yu, Peidongpeidong.yu (at) dlr.dehttps://orcid.org/0000-0001-6664-5942
Date:18 January 2021
Journal or Publication Title:Microgravity Science and Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:33
DOI :10.1007/s12217-020-09853-5
Page Range:pp. 1-12
Publisher:Springer
ISSN:0938-0108
Status:Published
Keywords:Granular gas, Granular shaking, Magnetic thermostat, Drop tower experiment, Discrete element method
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 - Model systems
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Sperl, Matthias
Deposited On:25 Jan 2021 09:03
Last Modified:25 Jan 2021 09:03

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