%0 Generic %1 citeulike:13095853 %A Wei, Xing %A abd Andreas Tilgner, Rainer Arlt %D 2014 %K imported %T A simplified model of collision-driven dynamo action in small bodies %U http://arxiv.org/abs/1311.6502 %X We investigate numerically the self-sustained dynamo action in a spinning sphere whose sense of rotation reverses periodically. This system serves as a simple model of a dynamo in small bodies powered by frequent collisions. It is found that dynamo action is possible in some intervals of collision rates. At high Ekman numbers the laminar spin-up flow is helical in the boundary layers and the Ekman circulation together with the azimuthal shear powers the dynamo action. At low Ekman number a non-axisymmetric instability helps the dynamo action. The intermittency of magnetic field occurs at low Ekman number.

@misc{citeulike:13095853, abstract = {{We investigate numerically the self-sustained dynamo action in a spinning sphere whose sense of rotation reverses periodically. This system serves as a simple model of a dynamo in small bodies powered by frequent collisions. It is found that dynamo action is possible in some intervals of collision rates. At high Ekman numbers the laminar spin-up flow is helical in the boundary layers and the Ekman circulation together with the azimuthal shear powers the dynamo action. At low Ekman number a non-axisymmetric instability helps the dynamo action. The intermittency of magnetic field occurs at low Ekman number.}}, added-at = {2019-03-25T08:20:55.000+0100}, archiveprefix = {arXiv}, author = {Wei, Xing and abd Andreas Tilgner, Rainer Arlt}, biburl = {https://www.bibsonomy.org/bibtex/2e84802b3ce93eb6446c9016f69b889dc/ericblackman}, citeulike-article-id = {13095853}, citeulike-linkout-0 = {http://arxiv.org/abs/1311.6502}, citeulike-linkout-1 = {http://arxiv.org/pdf/1311.6502}, day = 27, eprint = {1311.6502}, interhash = {09ba3a33da58f071f27b5ae413735811}, intrahash = {e84802b3ce93eb6446c9016f69b889dc}, keywords = {imported}, month = feb, posted-at = {2014-03-06 21:39:36}, priority = {2}, timestamp = {2019-03-25T08:20:55.000+0100}, title = {{A simplified model of collision-driven dynamo action in small bodies}}, url = {http://arxiv.org/abs/1311.6502}, year = 2014 }