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Full-Scale Numerica...
Full-Scale Numerical Modeling of Turbulent Processes in the Earth's Ionosphere
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- Eliasson, Bengt (författare)
- Umeå universitet,Institutionen för fysik
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- Stenflo, Lennart (författare)
- Umeå universitet,Institutionen för fysik
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- Shukla, Padma Kant (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- AIP, 2008
- 2008
- Engelska.
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Ingår i: Frontiers in Modern Plasma Physics. - : AIP. ; , s. 197-207
- Relaterad länk:
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http://link.aip.org/...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We present a full-scale simulation study of ionospheric turbulence by means of a generalized Zakharov model based on the separation of variables into high-frequency and slow time scales. The model includes realistic length scales of the ionospheric profile and of the electromagnetic and electrostatic fields, and uses ionospheric plasma parameters relevant for high-latitude radio facilities such as Eiscat and HAARP. A nested grid numerical method has been developed to resolve the different length-scales, while avoiding severe restrictions on the time step. The simulation demonstrates the parametric decay of the ordinary mode into Langmuir and ion-acoustic waves, followed by a Langmuir wave collapse and short-scale caviton formation, as observed in ionospheric heating experiments.
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)