The paper i have quoted is a following to a previous paper from 1992 and this is why they adress particulary the flaring aspect.Originally Posted by Tim Thompson
Maybe you can find the paper here. I cannot access the PS file so i can`t verified the contend.
Edouardo Battaner site
Other paper i find.
Local hydromagnetic simulations of accretion disc turbulence provide now the most convincing evidence that the origin of turbulence in discs could be the Balbus-Hawley magneto-rotational instability. The main results of such calculations are highlighted with particular emphasis on the generation of large scale magnetic fields. Comparison with mean-field dynamo theory is made. This theory is then used to address the question of the launching and collimation of winds emanating from the disc surfaces. (17 September 1999)