TY - JOUR
T1 - Granular rotor as a probe for a nonequilibrium bath
AU - Sano, Tomohiko G.
AU - Kanazawa, Kiyoshi
AU - Hayakawa, Hisao
N1 - Funding Information:
We are grateful for useful discussion with A. Puglisi and A. Gnoli. The numerical calculations were carried out on SR16000 at YITP in Kyoto University. This work is supported by the Grants-in-Aid for Japan Society for Promotion of Science (JSPS) Fellows (Grants No. 26 2906, No. 27 6208, and No. 28 5315), and JSPS KAKENHI (Grants No. 25287098 and No. 16H04025). This work is also partially supported by the JSPS core-to-core program for Nonequilibrium dynamics for soft matter and information.
Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/9/30
Y1 - 2016/9/30
N2 - This study numerically and analytically investigates the dynamics of a rotor under viscous or dry friction as a nonequilibrium probe of a granular gas. In order to demonstrate the role of the rotor as a probe for a nonequilibrium bath, the molecular dynamics (MD) simulation of the rotor is performed under viscous or dry friction surrounded by a steady granular gas under gravity. A one-to-one map between the velocity distribution function (VDF) of the granular gas and the angular distribution function for the rotor is theoretically derived. The MD simulation demonstrates that the one-to-one map accurately infers the local VDF of the granular gas from the angular VDF of the rotor, and vice versa.
AB - This study numerically and analytically investigates the dynamics of a rotor under viscous or dry friction as a nonequilibrium probe of a granular gas. In order to demonstrate the role of the rotor as a probe for a nonequilibrium bath, the molecular dynamics (MD) simulation of the rotor is performed under viscous or dry friction surrounded by a steady granular gas under gravity. A one-to-one map between the velocity distribution function (VDF) of the granular gas and the angular distribution function for the rotor is theoretically derived. The MD simulation demonstrates that the one-to-one map accurately infers the local VDF of the granular gas from the angular VDF of the rotor, and vice versa.
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U2 - 10.1103/PhysRevE.94.032910
DO - 10.1103/PhysRevE.94.032910
M3 - Article
AN - SCOPUS:84990219322
SN - 1063-651X
VL - 94
JO - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
JF - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
IS - 3
M1 - 032910
ER -