Ion parallel viscosity and anisotropy in MHD turbulence

Oughton, Sean

Ion parallel viscosity and anisotropy in MHD turbulence

dc.contributor.author	Oughton, Sean
dc.date.accessioned	2014-04-04T02:43:37Z
dc.date.available	2014-04-04T02:43:37Z
dc.date.copyright	1996-12
dc.date.issued	1996
dc.description.abstract	We report on results from direct numerical simulation of the incompressible three- dimensional magnetohydrodynamic (MHD) equations, modified to incorporate viscous dissipation via the strongly anisotropic ion-parallel viscosity term. Both linear and nonlinear cases are considered, all with a strong background magnetic field. It is found that spectral anisotropy develops in almost all cases, but that the contribution from effects associated with the ion-parallel viscosity is relatively weak compared with the previously reported nonlinear process. Furthermore, and in contrast to this earlier work, it is suggested that when B₀ is large, the anisotropy will develop and persist for many large-scale turnover times even for non-dissipative runs. Resistive dissipation is found to dominate over viscous even when the resistivity is several orders of magnitude smaller than the ion parallel viscosity. A variance anisotropy effect and anisotropy dependence on the polarization of the fluctuations are also observed.	en_NZ
dc.format.mimetype	application/pdf
dc.identifier.citation	Oughton, S. (1996). Ion parallel viscosity and anisotropy in MHD turbulence. J. Plasma Phys., 56(03), 641-657.	en_NZ
dc.identifier.doi	10.1017/s0022377800019504	en_NZ
dc.identifier.uri	https://hdl.handle.net/10289/8632
dc.language.iso	en	en_NZ
dc.publisher	Cambridge University Press	en_NZ
dc.relation.ispartof	Journal of Plasma Physics
dc.rights	©1996 Cambridge University Press.	en_NZ
dc.subject	magnetohydrodynamics (MHD)	en_NZ
dc.title	Ion parallel viscosity and anisotropy in MHD turbulence	en_NZ
dc.type	Journal Article	en_NZ