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

Semenov, Igor and Khrapak, Sergey and Thomas, Hubertus (2015) On the estimation of sound speed in two-dimensional Yukawa fluids. Physics of Plasmas, 22 (11), p. 114504. American Institute of Physics (AIP). DOI: 10.1063/1.4935846 ISBN 1070-664X ISSN 1070-664X

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Official URL: http://scitation.aip.org/content/aip/journal/pop/22/11/10.1063/1.4935846

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. Plasmas22, 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.

Item URL in elib:https://elib.dlr.de/100138/
Document Type:Article
Title:On the estimation of sound speed in two-dimensional Yukawa fluids
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Semenov, IgorForschungsgruppe Komplexe Plasmen, DLR, OPUNSPECIFIED
Khrapak, SergeyDLR, Sergey.Khrapak (at) dlr.deUNSPECIFIED
Thomas, HubertusDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Date:17 November 2015
Journal or Publication Title:Physics of Plasmas
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:22
DOI :10.1063/1.4935846
Page Range:p. 114504
Publisher:American Institute of Physics (AIP)
ISSN:1070-664X
ISBN:1070-664X
Status:Published
Keywords:speed of sound, complex plasmas, Yukawa systems, molecular dynamics, thermodynamic functions
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Komplexe Plasmen / Theory, Simulation
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma
Deposited By: Semenov, Igor
Deposited On:07 Dec 2015 12:30
Last Modified:06 Sep 2019 15:18

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