This work presents an analytical investigation of anomalous diffusion and turbulence in a dusty plasma monolayer, where energy transport across scales leads to the spontaneous formation of spatially disordered patterns. Many-body simulations of 10 000-particle dusty plasma monolayers are used to demonstrate how the global dynamics depend on the statistical properties of the dust assembly for realistic laboratory conditions. We find that disorder due to variations in the dust size distribution and charge-driven nonlocal interactions resulting in anomalous dust diffusion are key factors for the onset of instabilities. The resulting dynamics exhibit features of inertial turbulence over slightly more than half a decade of scales proportional or smaller than the Debye shielding length. These processes are examined analytically using a recently developed Fractional Laplacian Spectral technique, which identifies the active energy channels as a function of scale, disorder concentration, and features of the nonlocal interactions. The predictions from the theoretical (spectral) analysis demonstrate agreement with the results from the many-body (kinetic) simulations, thus providing a powerful tool for the study of active turbulence.
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July 2021
Research Article|
July 21 2021
Fractional Laplacian spectral approach to turbulence in a dusty plasma monolayer
Special Collection:
Transport in Non-Ideal, Multi-Species Plasmas
E. G. Kostadinova
;
E. G. Kostadinova
a)
1
CASPER and Department of Physics, Baylor University
, Waco, Texas 76706, USA
2
Physics Department, Leach Science Center, Auburn University
, Auburn, Alabama 36849, USA
a)Author to whom correspondence should be addressed: egk0033@auburn.edu
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R. Banka
;
R. Banka
1
CASPER and Department of Physics, Baylor University
, Waco, Texas 76706, USA
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J. L. Padgett
;
J. L. Padgett
1
CASPER and Department of Physics, Baylor University
, Waco, Texas 76706, USA
3
Department of Mathematical Sciences, University of Arkansas
, Fayetteville, Arkansas 72701, USA
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C. D. Liaw;
C. D. Liaw
1
CASPER and Department of Physics, Baylor University
, Waco, Texas 76706, USA
4
Department of Mathematical Sciences, University of Delaware
, Newark, Delaware 19716, USA
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L. S. Matthews
;
L. S. Matthews
1
CASPER and Department of Physics, Baylor University
, Waco, Texas 76706, USA
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T. W. Hyde
T. W. Hyde
1
CASPER and Department of Physics, Baylor University
, Waco, Texas 76706, USA
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a)Author to whom correspondence should be addressed: egk0033@auburn.edu
Note: This paper is part of the Special Collection: Transport in Non-Ideal, Multi-Species Plasmas.
Phys. Plasmas 28, 073705 (2021)
Article history
Received:
February 16 2021
Accepted:
June 28 2021
Citation
E. G. Kostadinova, R. Banka, J. L. Padgett, C. D. Liaw, L. S. Matthews, T. W. Hyde; Fractional Laplacian spectral approach to turbulence in a dusty plasma monolayer. Phys. Plasmas 1 July 2021; 28 (7): 073705. https://doi.org/10.1063/5.0047649
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