2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180109The inward flow of matter through accretion disks is driven by MHD turbulence. Global general relativistic MHD simulations shed quantitative light on this process, revealing a number of aspects of accretion previously unrecognized. Among them are strong stresses in the marginally stable and plunging regions near the black hole and electromagnetically-dominated conical relativistic jets that can form spontaneously from the accretion flow. The energy release associated with both of these effects can significantly augment the classical energy-release estimates based on purely hydrodynamic models.to appear in Proceedings of The Multicoloured Landscape of Compact Objects and their Explosive Origins, Cefalu, 2006Astrophysicstext