Different responses of the Rayleigh–Taylor type and resistive drift wave instabilities to the velocity shear
Abstract
The effects of velocity shear on the unstable modes driven by the effective gravity (Rayleigh–Taylor and interchange) and resistive drift wave instabilities for inhomogeneous equilibrium fluid/plasma density are analyzed for the localized eigenmode problems. It is shown that the effect of the velocity shear drastically depends on the type of instability. Whereas the velocity shear can significantly suppress both Rayleigh–Taylor and interchange instabilities, it has only a weak impact on the growth rate of the resistive drift wave. This is directly related to the physical nature of these instabilities. For the Rayleigh–Taylor and interchange instabilities, the shear flow tilts the eddies of the stream functions, while for the resistive drift wave instability the shear flow simply shifts the eddies in the radial direction with no tilting. However, for a large velocity shear, the eigenmode solutions for resistive drift waves cease to exist.
- Authors:
-
[1];
[2]
- Univ. of California, San Diego, CA (United States)
- Univ. of Saskatchewan, Saskatoon, SK (Canada)
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1800218
- Alternate Identifier(s):
- OSTI ID: 1596899
- Grant/Contract Number:
- FG02-04ER54739
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 2; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics; Plasma flows; Plasma instabilities
Citation Formats
Zhang, Y., Krasheninnikov, S. I., and Smolyakov, A. I. Different responses of the Rayleigh–Taylor type and resistive drift wave instabilities to the velocity shear. United States: N. p., 2020.
Web. doi:10.1063/1.5130409.
Zhang, Y., Krasheninnikov, S. I., & Smolyakov, A. I. Different responses of the Rayleigh–Taylor type and resistive drift wave instabilities to the velocity shear. United States. https://doi.org/10.1063/1.5130409
Zhang, Y., Krasheninnikov, S. I., and Smolyakov, A. I. Mon .
"Different responses of the Rayleigh–Taylor type and resistive drift wave instabilities to the velocity shear". United States. https://doi.org/10.1063/1.5130409. https://www.osti.gov/servlets/purl/1800218.
@article{osti_1800218,
title = {Different responses of the Rayleigh–Taylor type and resistive drift wave instabilities to the velocity shear},
author = {Zhang, Y. and Krasheninnikov, S. I. and Smolyakov, A. I.},
abstractNote = {The effects of velocity shear on the unstable modes driven by the effective gravity (Rayleigh–Taylor and interchange) and resistive drift wave instabilities for inhomogeneous equilibrium fluid/plasma density are analyzed for the localized eigenmode problems. It is shown that the effect of the velocity shear drastically depends on the type of instability. Whereas the velocity shear can significantly suppress both Rayleigh–Taylor and interchange instabilities, it has only a weak impact on the growth rate of the resistive drift wave. This is directly related to the physical nature of these instabilities. For the Rayleigh–Taylor and interchange instabilities, the shear flow tilts the eddies of the stream functions, while for the resistive drift wave instability the shear flow simply shifts the eddies in the radial direction with no tilting. However, for a large velocity shear, the eigenmode solutions for resistive drift waves cease to exist.},
doi = {10.1063/1.5130409},
journal = {Physics of Plasmas},
number = 2,
volume = 27,
place = {United States},
year = {Mon Feb 03 00:00:00 EST 2020},
month = {Mon Feb 03 00:00:00 EST 2020}
}
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