2024-03-05T01:18:11Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00024863
2023-01-16T04:45:32Z
879:880:881
Non-MHD effects in the nonlinear development of the MHD-scale Rayleigh-Taylor instability
Takayuki, Umeda
Yasutaka, Wada
open access
Copyright 2017 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in (Physics of Plasmas. v.24, 2017, p.072307) and may be found at (http://dx.doi.org/10.1063/1.4991409).
The nonlinear evolution of the Rayleigh-Taylor instability (RTI) at a density shear layer transverse<br/>to magnetic field in a collisionless plasma is investigated by means of a fully kinetic<br/>Vlasov simulation with two spatial and two velocity dimensions. The primary RTI in the MHD<br/>regime develops symmetrically in a coordinate axis parallel to gravity as seen in the previous<br/>MHD simulations. The primary RTI in the Hall-MHD regime develops asymmetrically in a<br/>coordinate axis parallel to gravity. A compressible flow is formed at the secondary density shear<br/>layer by the Hall effect, which generates a strong scalar pressure gradient of ions. A Hall electric<br/>field due to the diamagnetic current results in the asymmetric flow at the tip of the finger structure.<br/>In the primary RTI with the ion gyro kinetic effect, secondary RTI with a wavelength<br/>shorter than the wavelength of the primary RTI is generated at the saturation stage of the primary<br/>RTI. A seed perturbation for the secondary RTI is excited by another secondary instability<br/>due to the coupling between the electron stress tensor and the Hall electric field. The heat<br/>flux term plays an important role in the time development of the total pressure. On the other<br/>hand, the contribution of the ion stress tensor is small in both the electric current and the total<br/>pressure.
AIP Publishing
2017-07-07
eng
journal article
VoR
http://hdl.handle.net/2237/27083
https://nagoya.repo.nii.ac.jp/records/24863
https://doi.org/10.1063/1.4991409
1070-664X
Physics of Plasmas
24
072307
072307
https://nagoya.repo.nii.ac.jp/record/24863/files/1_4991409.pdf
application/pdf
4.8 MB
2018-07-07