Convection in the presence of magnetic fields

✍ Scribed by R.S. Peckover; N.O. Weiss

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 539 KB
• Volume: 4
• Category: Article
• ISSN: 0010-4655
• DOI: 10.1016/0010-4655(72)90095-1

✦ Synopsis

Convection driven by horizontal temperatures gradients in an electrically conducting, viscous, Boussinesq fluid has been studied on a computer. Results of numerical experimentswith a Grashof number of 1 are presented and compared with linear theory. Weak magnetic fields are distorted and concentrated without significantly affecting the motion, while strong fields virtually suppress convection. For moderate fields there is a nonlinear regime in which the global magnetic and kinetic energies are comparablethough the peak magnetic energy density may be an order of magnitude greater than the maximum energy density. The astrophysical relevance of these results is discussed.

* Paper presented at the First European Conference on Corn-star make the study of con~1ection in a real star much putational Physics, Geneva, 10-14 April 1972. more difficult. Sunspots provide the most obvious lo-