Advection Dominated Accretion Flows Around Kerr Black Holes
  We derive all relevant equations needed for constructing a global general relativistic model of advectively cooled, very hot, optically thin accretion disks around black holes and present solutions which describe advection dominated flows in the gravitational field of a Kerr black hole. 
M. A. Abramowicz, X.-M. Chen, M. Granath, J.-P. Lasota