19 بهمن 1401

علیرضا خصالی

مرتبه علمی: استاد
نشانی: بابلسر -دانشگاه مازندران -دانشکده علوم پایه- گروه فیزیک
تحصیلات: دکترای تخصصی / اختر فیزیک
تلفن: 35343085
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان The thermo magnetic instability in hot viscose plasmas
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Viscosity, Self gravity , Accretion disks
مجله ASTROPHYSICS AND SPACE SCIENCE
شناسه DOI 10.1007/s10509-017-3174-0
پژوهشگران احد حقانی (نفر اول) ، آذر خسروی (نفر دوم) ، علیرضا خصالی (نفر سوم)

چکیده

Magnetic Rotational Instability (MRI) can not performed well in accretion disks with strong magnetic field. Studies have indicated a new type of instability called thermomagnetic instability (TMI) in systems where Nernst coefficient and gradient temperature were considered. Nernst coefficient would appear if Boltzman equation could be expanded through ωBe (cyclotron frequency). However, the growth rate of this instability was two magnitude orders below MRI growth (Ωk), which could not act the same as MRI. Therefor, a higher growth rate of unstable modes was needed. In this paper, rotating viscid hot plasma with strong magnetic filed was studied. Firstly, a constant alpha viscosity was studied and then a temperature sensitive viscosity. The results showed that the temperature sensitive viscosity would be able to increase the growth rate of TMI modes significantly, hence capable of acting similar to MRI.