We present a linear stability analysis of the perturbation modes in anisotropic MHD flows with velocity shear and strong magnetic field. Collisionless or weakly collisional plasma is described within the 16-momentum MHD fluid closure model, that takes into account not only the effect of pressure anisotropy, but also the effect of anisotropic heat fluxes. In this model the low frequency acoustic wave is revealed into a standard acoustic mode and higher frequency fast thermo-acoustic and lower frequency slow thermo-acoustic waves. It is shown that thermo-acoustic waves become unstable and grow exponentially when the heat flux parameter exceeds some critical value. It seems that velocity shear makes thermo-acoustic waves overstable even at subcritical heat flux parameters. Thus, when the effect of heat fluxes is not profound acoustic waves will grow due to the velocity shear, while at supercritical heat fluxes the flow reveals compressible thermal instability. Anisotropic thermal instability should be also important in astrophysical environments, where it will limit the maximal value of magnetic field that a low density ionized anisotropic flow can sustain.
Below are the queries associated with your article; please answer all of these queries before sending the proof back to AIP.Article checklist: In order to ensure greater accuracy, please check the following and make all necessary corrections before returning your proof.1. Is the title of your article accurate and spelled correctly? 2. Please check affiliations including spelling, completeness, and correct linking to authors. 3. Did you remember to include acknowledgment of funding, if required, and is it accurate? Location in articleQuery / Remark: click on the Q link to navigate to the appropriate spot in the proof. There, insert your comments as a PDF annotation. AQ1Please check that the author names are in the proper order and spelled correctly. Also, please ensure that each author's given and surnames have been correctly identified (given names are highlighted in red and surnames appear in blue). AQ2Please check the definition of ODE. AQ3Ref. 28 was not cited in your original manuscript. We have inserted a citation for it in the sentence beginning "Waves and instabilities of anisotropic…." Please carefully review our placement of the citation and confirm that it is correct. If it is not correct, mark the citation for deletion and specify where the citation for Ref. 28 should be inserted. AQ4We were unable to locate a digital object identifier (doi) for Ref(s). 2, 3, 17, and 25. Please verify and correct author names and journal details (journal title, volume number, page number, and year) as needed and provide the doi. If a doi is not available, no other information is needed from you. For additional information on doi's, please select this link: http://www.doi.org/. AQ5We have reworded the sentence beginning "Section III presents…" for clarity. Please check that your meaning is preserved.Please confirm ORCIDs are accurate. If you wish to add an ORCID for any author that does not have one, you may do so now. For more information on ORCID, see https://orcid.org/.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.