Compressible hydromagnetic shear flows with anisotropic thermal pressure: Nonmodal study of waves and instabilities
- Department of Theoretical Astrophysics, Abastumani Astrophysical Observatory, Tbilisi 380060, Republic of Georgia, and Department of Plasma Physics, Space Research Institute, str. Profsoyuznaya 84/32, 117810 Moscow (Russia)
- Department of Theoretical Astrophysics, Abastumani Astrophysical Observatory, Tbilisi 380060, Republic of Georgia, and International Center of Theoretical Physics, Trieste 34100 (Italy)
- Department of Physics, University of Cape Town, Rondebosch 7700, South Africa, and Department of Theoretical Astrophysics, Abastumani Astrophysical Observatory, Tbilisi 380060, Republic of (Georgia)
The evolution of linear magnetohydrodynamic waves and plasma instabilities (firehose and mirror) in a compressible, magnetized plane Couette flow with anisotropic thermal pressure is investigated. In the present study we revealed that the pressure anisotropy brings significant novelty to the effect of coupling and linear reciprocal transformation of the wave modes originally discovered [Chagelishvili, Rogava, and Tsiklauri, Phys. Rev. E {bold 53}, 6028 (1996)]. It is found that behavior of the firehose and mirror instabilities is drastically changed due to the presence of shear in the flow. These novel effects are caused by the non-normality of linear dynamics in shear flows and they have been revealed through use of the nonmodal approach. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 544552
- Journal Information:
- Physics of Plasmas, Vol. 4, Issue 5; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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