Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Конференция: International Conference on Problems of Geocosmos; St Petersburg, RUSSIA; St Petersburg, RUSSIA
Год издания: 2010
Аннотация: Magnetic reconnection is universal plasma process which is responsible for solar flares, magnetospheric substorms and solar wind - magnetosphere coupling. In the course of reconnection two outflow regions with accelerated plasma are formed. Magnetic reconnection occurs very often in asymmetric current layers which separate two plasmas with different parameters. When reconnection started, the current layer breaks up to a system of MHD discontinuities such as Alfve'n discontinuities, slow shocks, and contact discontinuities. Between them MHD parameters (plasma speed, magnetic field, plasma density and temperature) are constant if initial current sheet can be considered as tangential discontinuity. The problem about decay of tangential discontinuity is known as Riemann problem which can be solved analytically for the case of weak reconnection. In reality an initial current layer has some internal structure and finite thickness. Therefore there is a question on applicability of the theory (analytical solution). To outline the boundary of applicability it is necessary to compare MHD simulation to the analytical solution. The MHD parameters obtained from the solution of the Riemann problem have been compared with the result of MHD simulation of asymmetric reconnection. After some initial period which is necessary for MHD discontinuities to be formed, comparison shows rather good agreement.
Журнал: PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE PROBLEMS OF GEOCOSMOS
Номера страниц: 241-246
Место издания: ST PETERSBURG
Издатель: ST PETERSBURG STATE UNIV, FAC PHYSICS
Вхождение в базы данных
Информация о публикациях загружается с сайта службы поддержки публикационной активности СФУ. Сообщите, если заметили неточности.