Robuta

https://zdenekstuchlik.com/2006/11/toroidal-lnrf-velocity-profiles-in-thick-accretion-discs-orbiting-rapidly-rotating-kerr-black-holes-2/ Toroidal LNRF-velocity profiles in thick accretion discs orbiting rapidly rotating Kerr black holes... kerr black holes profiles in accretion discs toroidal velocity