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Self-diffusion in single-component Yukawa fluids

Khrapak, Sergey and Klumov, Boris and Couedel, L. (2018) Self-diffusion in single-component Yukawa fluids. Journal of Physics Communications, 2, 045013. Institute of Physics (IOP) Publishing. DOI: 10.1088/2399-6528/aaba23 ISSN 2399-6528

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Abstract

It was suggested in the literature that the self-diffusion coefficient of simple fluids can be approximated as a ratio of the squared thermal velocity of the atoms to the "fluid Einstein frequency", which can thus serve as a rough estimate of the friction (momentum transfer) rate in the dense fluid phase. In this article we test this suggestion using a single-component Yukawa fluid as a reference system. The available simulation data on self-diffusion in Yukawa fluids, complemented with new data for Yukawa melts (Yukawa fluids near the freezing phase transition), are carefully analyzed. It is shown that although not exact, this earlier suggestion nevertheless provides a very sensible way of normalization of the self-diffusion constant. Additionally, we demonstrate that certain quantitative properties of self-diffusion in Yukawa melts are also shared by systems like one-component plasma and liquid metals at freezing, providing support to an emerging dynamical freezing indicator for simple soft matter systems. The obtained results are also briefly discussed in the context of the theory of momentum transfer in complex (dusty) plasmas.

Item URL in elib:https://elib.dlr.de/119697/
Document Type:Article
Title:Self-diffusion in single-component Yukawa fluids
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Khrapak, SergeyDLR, Sergey.Khrapak (at) dlr.deUNSPECIFIED
Klumov, Borisaix-marseille-universityUNSPECIFIED
Couedel, L.CNRS, Aix-Marseille UniversiteUNSPECIFIED
Date:6 April 2018
Journal or Publication Title:Journal of Physics Communications
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:No
Volume:2
DOI :10.1088/2399-6528/aaba23
Page Range:045013
Publisher:Institute of Physics (IOP) Publishing
ISSN:2399-6528
Status:Published
Keywords:self-diffusion in fluids, Yukawa fluids, Yukawa melts, complex (dusty) plasma
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:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Khrapak, Sergey
Deposited On:23 Apr 2018 06:49
Last Modified:23 Apr 2018 06:49

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