The effect of hyperviscosity on geodynamo models

Details The effect of hyperviscosity on geodynamo models The effect of hyperviscosity on geodynamo models

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2869z&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 22, p. 2869-2872

Physics

55

Geomagnetism And Paleomagnetism: General Or Miscellaneous

Scientific paper

Some fundamental difficulties in the construction of an Earth-like dynamo model and the role of hyperviscosity in attempting to overcome these difficulties are discussed. An Earth-like convection model influenced by an imposed toroidal magnetic field is investigated both with and without the effect of hyperviscosity. It is shown that hyperviscosity affects the dynamics of convection significantly; the effect is similar in some respects to that of a strong magnetic field. The effective Ekman number, a key parameter for an Earth-like dynamo model, is substantially increased when hyperviscosity is employed.

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