Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-19
Astronomy and Astrophysics
Astrophysics
To appear in proceedings of: 3-D Signatures in Stellar Explosions (A workshop honoring J. Craig Wheeler's 60th birthday, June
Scientific paper
We have argued that magnetohydrodynamic (MHD) turbulence in an accretion disk naturally produces hoop-stresses, and that in a geometrically-thick flow these stresses could both drive and collimate an outflow. We based this argument on an analogy of turbulent MHD fluids to viscoelastic fluids, in which azimuthal shear flow creates hoop-stresses that cause a variety of flow phenomena, including the Weissenberg effect in which a fluid climbs a spinning rod. One of the more important differences between the Weissenberg effect and astrophysical jets is the source of power. In our previous analysis, we only considered the power due to the spin-down torque on the central object, and thus found that we could only drive an outflow if the central object were maximally rotating. Here we take into account the energy that is liberated by the accreting matter, and describe a scenario in which this energy couples to the outflow to create a thermodynamic engine.
No associations
LandOfFree
Turbulent Magnetohydrodynamic Jet Collimation and Thermal Driving does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Turbulent Magnetohydrodynamic Jet Collimation and Thermal Driving, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbulent Magnetohydrodynamic Jet Collimation and Thermal Driving will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-198087