Bulletin KRASEC. Phys. & Math. Sci, 2015, V. 11, №. 2, pp. 51-56. ISSN 2313-0156
DOI: 10.18454/2313-0156-2015-11-2-51-56
MSC 65N80
REVERSALS OF MAGNETIC FIELD IN THE LARGE-SCALE αΩ-DYNAMO
G.M. Vodinchar¹², A.N. Godomskaya¹, O.V. Sheremetyeva¹²
¹Institute of Cosmophysical Research and Radio Wave Propagation, Far-Eastern Branch, Russian Academy of Sciences, 684034, Kamchatskiy Kray, Paratunka, Mirnaya st., 7, Russia.
²Vitus Bering Kamchatka State University, 683031, Petropavlovsk-Kamchatskiy, Pogranichnaya st., 4, Russia.
E-mail: gvodinchar@ikir.ru, anna_ antonenko@mail.ru, olga.v.sheremetyeva@gmail.com
The paper investigates the question on the possibility of reversals within a low-mode model of αΩ-dynamo. The MHD-system parameters were defined when reversals of the magnetic field during the relative constancy of velocity fields of a viscous conducting magnetized fluid are possible. The results of numerical solution of the system with the assumption of various types of dependences of α-effect amplitude on radius are discussed.
Key words: αΩ-dynamo, magnetic field, reversal, large-scale dynamo model.
References
- Parker E.N. Hydromagnetic dynamo models. Astrophys. J. 1955. № 122. p. 293–314.
2. Krause, F. and R¨adler, K.-H. Mean-filed magnetohydrodynamics and dynamo theory. Pergamon Press. 1980.
3. Steenbek M., Krause F. and Radler K.-H. Berechnung der mittlerer Lorentz–Field Starke vB fur ein elektrisch leitendes Medium in turbulenter, durch Coriolis–Krafte beenflusster Bewegung. Z. Naturforsch. 1996. № 21. p. 369-376.
4. Steenbek M. and Krause F. Zur Dynamotheorie stellarer and planetarer Magnetfelder. I. Berechnunug sonnenahnlicher Wechselfeldgeneratoren. Astron. Nachr. 1969. № 291. p. 49-84.
5. Zeldovich, Ya.B., Rusmaikin, A.A., and Sokoloff, D.D.: Magnetic fields in astrophysics. The Fluid Mechanics of Astrophysics and Geophysics, Gordon and Breach, New York, 1983.
6. Merril R.T., McElhinny M.W. and McFadden P.L. The Magnetic Field of the Earth: Paleomagnetism, the Core, and the Deep Mantle. Academic Press. London. 1996.
7. Gledzer E.B., Dolzhanskii F.V., Obukhov A.M. Sistemy gidrodinamicheskogo tipa i ikh primenenie [Hydrodynamic systems and their application]. Moscow, Nauka, 1981, 368 p.
8. El’sgol’ts L.E. Differentsial’nye uravneniya i variatsionnoe ischislenie [Differential equations and variational calculus]. Moscow, Nauka, 1969, 424 p.
For citation: Vodinchar G.M., Godomskaya A.N., Sheremetyeva O.V. Reversals of magnetic field in the large-scale αΩ -dynamo. Bulletin KRASEC. Physical and Mathematical Sciences 2015, vol. 11, issue 2, 51-56. DOI: 10.18454/2313-0156-2015-11-2-51-56.
Original article submitted: 16.11.2015
Vodinchar Gleb Mikhailovich – Ph.D. (Phys. Math.), Head of Lab. Modeling of physical processes, Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS, Associate Professor, Dept. Mathematics & Physics, Vitus Bering Kamchatka State University.
Godomskaya Anna Nikolaevna – Postgraduate Student, Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS.
Sheremetyeva Olga Vladimirovna – Ph.D. (Tech.), Researcher of Lab. Modeling of physical processes, Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS., Associate Professor, Dept. of Mathematics and Physics, Vitus Bering Kamchatka State University.
Download article Vodinchar G.M. et al