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Title: On the estimation of sound speed in two-dimensional Yukawa fluids

Abstract

The longitudinal sound speed in two-dimensional Yukawa fluids is estimated using the conventional hydrodynamic expression supplemented by appropriate thermodynamic functions proposed recently by Khrapak et al. [Phys. Plasmas 22, 083706 (2015)]. In contrast to the existing approaches, such as quasi-localized charge approximation (QLCA) and molecular dynamics simulations, our model provides a relatively simple estimate for the sound speed over a wide range of parameters of interest. At strong coupling, our results are shown to be in good agreement with the results obtained using the QLCA approach and those derived from the phonon spectrum for the triangular lattice. On the other hand, our model is also expected to remain accurate at moderate values of the coupling strength. In addition, the obtained results are used to discuss the influence of the strong coupling effects on the adiabatic index of two-dimensional Yukawa fluids.

Authors:
 [1];  [1]
  1. Forschungsgruppe Komplexe Plasmen, Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen (Germany)
Publication Date:
OSTI Identifier:
22489896
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; FLUIDS; MOLECULAR DYNAMICS METHOD; PHONONS; SOUND WAVES; SPECTRA; STRONG-COUPLING MODEL; THERMODYNAMIC MODEL; TWO-DIMENSIONAL CALCULATIONS; YUKAWA POTENTIAL

Citation Formats

Semenov, I. L., E-mail: Igor.Semenov@dlr.de, Thomas, H. M., Khrapak, S. A., and Aix-Marseille-Université, CNRS, Laboratoire PIIM, UMR 7345, 13397 Marseille Cedex 20. On the estimation of sound speed in two-dimensional Yukawa fluids. United States: N. p., 2015. Web. doi:10.1063/1.4935846.
Semenov, I. L., E-mail: Igor.Semenov@dlr.de, Thomas, H. M., Khrapak, S. A., & Aix-Marseille-Université, CNRS, Laboratoire PIIM, UMR 7345, 13397 Marseille Cedex 20. On the estimation of sound speed in two-dimensional Yukawa fluids. United States. https://doi.org/10.1063/1.4935846
Semenov, I. L., E-mail: Igor.Semenov@dlr.de, Thomas, H. M., Khrapak, S. A., and Aix-Marseille-Université, CNRS, Laboratoire PIIM, UMR 7345, 13397 Marseille Cedex 20. 2015. "On the estimation of sound speed in two-dimensional Yukawa fluids". United States. https://doi.org/10.1063/1.4935846.
@article{osti_22489896,
title = {On the estimation of sound speed in two-dimensional Yukawa fluids},
author = {Semenov, I. L., E-mail: Igor.Semenov@dlr.de and Thomas, H. M. and Khrapak, S. A. and Aix-Marseille-Université, CNRS, Laboratoire PIIM, UMR 7345, 13397 Marseille Cedex 20},
abstractNote = {The longitudinal sound speed in two-dimensional Yukawa fluids is estimated using the conventional hydrodynamic expression supplemented by appropriate thermodynamic functions proposed recently by Khrapak et al. [Phys. Plasmas 22, 083706 (2015)]. In contrast to the existing approaches, such as quasi-localized charge approximation (QLCA) and molecular dynamics simulations, our model provides a relatively simple estimate for the sound speed over a wide range of parameters of interest. At strong coupling, our results are shown to be in good agreement with the results obtained using the QLCA approach and those derived from the phonon spectrum for the triangular lattice. On the other hand, our model is also expected to remain accurate at moderate values of the coupling strength. In addition, the obtained results are used to discuss the influence of the strong coupling effects on the adiabatic index of two-dimensional Yukawa fluids.},
doi = {10.1063/1.4935846},
url = {https://www.osti.gov/biblio/22489896}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 11,
volume = 22,
place = {United States},
year = {Sun Nov 15 00:00:00 EST 2015},
month = {Sun Nov 15 00:00:00 EST 2015}
}