Yu, Peidong and Matthias, Schröter and Sperl, Matthias (2020) Velocity Distribution of a Homogeneously Cooling Granular Gas. Physical Review Letters, 124. American Physical Society. doi: 10.1103/PhysRevLett.124.208007. ISSN 0031-9007.
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Official URL: https://doi.org/10.1103/PhysRevLett.124.208007
Abstract
In contrast to molecular gases, granular gases are characterized by inelastic collisions and require therefore permanent driving to maintain a constant kinetic energy. The kinetic theory of granular gases describes how the average velocity of the particles decreases after the driving is shut off. Moreover, it predicts that the rescaled particle velocity distribution will approach a stationary state with overpopulated high-velocity tails as compared to the Maxwell-Boltzmann distribution. While this fundamental theoretical result was reproduced by numerical simulations, an experimental confirmation is still missing. Using a microgravity experiment that allows the spatially homogeneous excitation of spheres via magnetic fields, we confirm the theoretically predicted exponential decay of the tails of the velocity distribution.
Item URL in elib: | https://elib.dlr.de/135102/ | ||||||||||||||||
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Document Type: | Article | ||||||||||||||||
Title: | Velocity Distribution of a Homogeneously Cooling Granular Gas | ||||||||||||||||
Authors: |
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Date: | 22 May 2020 | ||||||||||||||||
Journal or Publication Title: | Physical Review Letters | ||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||
Open Access: | Yes | ||||||||||||||||
Gold Open Access: | No | ||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||
Volume: | 124 | ||||||||||||||||
DOI: | 10.1103/PhysRevLett.124.208007 | ||||||||||||||||
Publisher: | American Physical Society | ||||||||||||||||
ISSN: | 0031-9007 | ||||||||||||||||
Status: | Published | ||||||||||||||||
Keywords: | granular gas, microgravity, kinetic theory, Mapheus | ||||||||||||||||
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: | 02 Jun 2020 07:13 | ||||||||||||||||
Last Modified: | 24 Oct 2023 11:55 |
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