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String fluids, turbulence, and waves studied on the level of the constituent particles using complex plasmas

Schwabe, Mierk and Antonova, Tetyana and Khrapak, Sergey and Lipaev, Andrey and Molotkov, Vladimir and Nosenko, V. and Pustylnik, Mikhail and Räth, Christoph and Thoma, Markus and Usachev, Alexandr and Zhdanov, Sergey and Zobnin, Andrey and Petrov, Oleg and Fortov, Vladimir and Thomas, Hubertus (2018) String fluids, turbulence, and waves studied on the level of the constituent particles using complex plasmas. 12th European Fluid Mechanics Conference, 10.-13. Sep. 2018, Wien, Österreich.

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Abstract

Complex plasmas are low-temperature plasmas with embedded microparticles. The microparticles in the plasma acquire high charges and strongly interact with each other. They form a classical condensed matter system, which can be used to investigate many generic phenomena on the level of individual particles. The microparticles are significantly affected by gravity, and unstressed three-dimensional microparticle clouds can only be studied under microgravity conditions. Here, we present studies of fluid complex plasmas performed in the RussianGerman complex plasma laboratory PK-3 Plus and the Russian-European PK-4 on board the International Space Station (ISS). The heart of PK-3 Plus was a capacitively coupled plasma chamber, and that of the successor PK-4 a DC plasma tube. Micropaticles can be injected in the plasma, which are illuminated from the side with light from a laser that is spread into a plane. The light scattered by the microparticles is recorded with digital cameras, with enables studying their movement in detail. Under certain conditions, instabilities turbulize the microparticle movement, or induce waves, which can then be studied in detail on the level of individual particles. When the applied electric field is quickly switched in polarity, ions flowing around the microparticles cause positive space charges (wakes), which attract other microparticles. This leads to the formation of microparticle strings - an electrorhelogical fluid. Fig. 1 shows an example of waves propagating in such a string fluid.

Item URL in elib:https://elib.dlr.de/121755/
Document Type:Conference or Workshop Item (Speech)
Title:String fluids, turbulence, and waves studied on the level of the constituent particles using complex plasmas
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwabe, MierkMierk.Schwabe (at) dlr.dehttps://orcid.org/0000-0001-6565-5890
Antonova, TetyanaTetyana.Antonova (at) dlr.deUNSPECIFIED
Khrapak, SergeyDLR, Sergey.Khrapak (at) dlr.deUNSPECIFIED
Lipaev, AndreyJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Molotkov, VladimirJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Nosenko, V.v.nosenko (at) dlr.deUNSPECIFIED
Pustylnik, MikhailDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Räth, ChristophDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Thoma, MarkusJustus-Liebig Universität GiessenUNSPECIFIED
Usachev, AlexandrJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Zhdanov, SergeySergey.Zhdanov (at) dlr.deUNSPECIFIED
Zobnin, AndreyJoint Institute for High Temperatures, Russian Academy of SciencesUNSPECIFIED
Petrov, OlegJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Fortov, VladimirJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Thomas, HubertusDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Date:September 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:complex plasmas, fluid effects, waves, string formation, turbulence, microgravity
Event Title:12th European Fluid Mechanics Conference
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:10.-13. Sep. 2018
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 / Zero gravity
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Schwabe, Dr. Mierk
Deposited On:20 Sep 2018 11:09
Last Modified:28 Mar 2019 08:50

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