Journal
ASTRONOMY & ASTROPHYSICS
Volume 547, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201118511
Keywords
accretion, accretion disks; turbulence; methods: laboratory; hydrodynamics
Categories
Funding
- CNRS
- NWO
- [NSF-DMR 0906109]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0906109] Funding Source: National Science Foundation
Ask authors/readers for more resources
We present angular momentum transport (torque) measurements in two recent experimental studies of the turbulent flow between independently rotating cylinders. In addition to these studies, we reanalyze prior torque measurements to expand the range of control parameters for the experimental Taylor-Couette flows. We find that the torque may be described as a product of functions that depend only on the Reynolds number, which describes the turbulent driving intensity, and the rotation number, which characterizes the effects of global rotation. For a given Reynolds number, the global angular momentum transport for Keplerian-like flow profiles is approximately 14% of the maximum achievable transport rate. We estimate that this level of transport would produce an accretion rate of (M) over dot/(M) over dot(0) similar to 10(-3) in astrophysical disks. We argue that this level of transport from hydrodynamics alone could be significant. We also discuss the possible role of finite-size effects in triggering or sustaining turbulence in our laboratory experiments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available