Change search
ReferencesLink to record
Permanent link

Direct link
MHD Modeling of Magnetic Reconnection Shock Structure at the Dayside Magnetopause
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Magnetic reconnection is a plasma phenomenon where the frozen-in magnetic field lines of a magnetic field breaks down locally and reconnects to other field lines, thus causing a rearrangement of the magnetic topology. This process allows for a release of energy, where magnetic energy stored in the current sheet is transformed into kinetic and thermal energy, forming high-speed plasma outflows from the point of reconnection. This thesis aims to investigate the structure and relative magnitude of different physical quantities in the produced plasma outflow regions, and identify arising magnetohydrodynamic (MHD) discontinuities. The setting investigated in this thesis is the dayside of the terrestrial magnetopause where reconnection is assumed to occur when the interplanetary magnetic field and the terrestrial magnetic field interacts.A two-dimensional, steady-state, compressible, non-viscous and non-resistive model is created in the COMSOL Multiphysics modeling environment, a software capable of handling couple physical effects, and solving the involved partial differential equations (PDEs) simultaneously, PDEs which are derived from the MHD description. The model is investigated specifically regarding the effect of a non-zero tangential component of the magnetosheath plasma flow, colliding with the magnetopause. The results are presented in form of surface-plots and one-dimensional plots, for both the south- and northward plasma outflows emanating from the point of reconnection, displaying the relative quantities of the different variables involved. Slow shocks and a contact discontinuity is found by analyzing the resulting one-dimensional plots.

Place, publisher, year, edition, pages
2013. , 57 p.
Keyword [en]
Keyword [sv]
Teknik, Magnetisk rekonnektion, COMSOL, Simulering, MHD, Magnetosfär
URN: urn:nbn:se:ltu:diva-51901Local ID: 912bd0fa-b61f-4058-b68d-bed7620180cfOAI: diva2:1025265
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Validerat; 20131011 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(3298 kB)0 downloads
File information
File name FULLTEXT02.pdfFile size 3298 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Isaksson Stålnacke, Mikael

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link