Schwabe, Mierk und Zhdanov, Sergey und Räth, Christoph (2017) Onset of turbulence in an autooscillating complex plasma. International Conference on the Physics of Dusty Plasmas, 2017-05-20 - 2017-05-25, Prag, Tschechien.
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Kurzfassung
Turbulence is one of the last unresolved issues of modern theoretical physics. In conventional experiments on turbulence, the carriers of the interaction are not directly observable. Instead, typically tracer particles are used - a method that might not produce reliable results [1]. Here, we present an experiment performed in the PK-3 Plus Laboratory on board the International Space Station [2] which allows investigating the fundamental particles in turbulence directly. First, the complex plasma cloud was stabilized with an alternating electric field. Once the stabilization was switched off, a heartbeat instability developed, and the microparticles started oscillating radially. We show that the kinetic energy spectra develop a double cascade once the cloud becomes unstable, see Figure 1. This double cascade has been predicted by Kraichnan [3] and Leith [4] for forced two-dimensional turbulence, but has only seldomly been observed in experiments [5]. We also show that the reduced rates of energy and enstrophy transfer can be used to infer the excitation wave number kexc, in good agreement with kexc obtained from the energy spectrum. [1] V. Mathai et al. Phys. Rev. Lett. 117, 024501 (2016). [2] H. M. Thomas et al. New J. Phys. 10, 033036 (2008). [3] R. H. Kraichnan. Phys. Fluids 10, 1417 (1967). [4] C. E. Leith. Phys. Fluids 11, 671 (1968). [5] G. Boffetta and R. E. Ecke. Ann. Rev. Fluid Mech. 44, 427{451 (2012)
elib-URL des Eintrags: | https://elib.dlr.de/112697/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||
Titel: | Onset of turbulence in an autooscillating complex plasma | ||||||||||||||||
Autoren: |
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Datum: | Mai 2017 | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Ja | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | komplexes Plasma, staubiges Plasma, Turbulenz, Instabilität | ||||||||||||||||
Veranstaltungstitel: | International Conference on the Physics of Dusty Plasmas | ||||||||||||||||
Veranstaltungsort: | Prag, Tschechien | ||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 20 Mai 2017 | ||||||||||||||||
Veranstaltungsende: | 25 Mai 2017 | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||
HGF - Programmthema: | Forschung unter Weltraumbedingungen | ||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Komplexe Plasmen / Schwerelosigkeit (alt) | ||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||
Institute & Einrichtungen: | Institut für Materialphysik im Weltraum | ||||||||||||||||
Hinterlegt von: | Schwabe, Dr. Mierk | ||||||||||||||||
Hinterlegt am: | 19 Jun 2017 08:45 | ||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:17 |
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