elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Velocity Distribution of a Homogeneously Cooling Granular Gas

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.

[img] PDF - Published version
1MB

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/
Document Type:Article
Title:Velocity Distribution of a Homogeneously Cooling Granular Gas
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Yu, Peidongpeidong.yu (at) dlr.dehttps://orcid.org/0000-0001-6664-5942
Matthias, SchröterUNSPECIFIEDhttps://orcid.org/0000-0002-8332-5585
Sperl, MatthiasMatthias.Sperl (at) dlr.dehttps://orcid.org/0000-0001-9525-0368
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:02 Jun 2020 07:13

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.