Turbulent resistivity evaluation in MRI generated turbulence

摘要: (abriged) MRI turbulence is a leading mechanism for the generation of an efficient turbulent transport angular momentum in accretion disk through viscosity effect. It believed that same process could also large-scale magnetic fields disks, reshaping structures these objects. This process, known as resistivity, has been suggested and used several accretion-ejection models simulations to produce jets. Still, efficiency MRI-driven largely unknown. We investigate this problem both analytically numerically. We introduce linear calculation presence spatially inhomogeneous mean field. show that, configuration, modes lead field transport, on order transport. next use fully non compute resistivity configurations. find all our simulations, although somewhat lower. The tensor found be highly anisotropic with diffusion coefficient 3 times greater radial direction than vertical direction. These results support possibility driving jets from disks; resulting may not steady.