Anisotropic hydrodynamic turbulence in accretion disks
Anisotropic hydrodynamic turbulence in accretion disks
复制标题
吸积盘中的各向异性流体动力湍流
DOI:
10.1051/0004-6361/201630226
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发表时间:
2017
影响因子:
6.5
通讯作者:
Picogna
中科院分区:
文献类型:
--
作者:
Picogna
Recently, the vertical shear instability (VSI) has become an attractive purely hydrodynamic candidate for the anomalous angular momentum transport required for weakly ionized accretion disks. In direct three-dimensional numerical simulations of VSI turbulence in disks, a meridional circulation pattern was observed that is opposite to the usual viscous flow behavior. Here, we investigate whether this feature can possibly be explained by an anisotropy of the VSI turbulence. Using three-dimensional hydrodynamical simulations, we calculate the turbulent Reynolds stresses relevant for angular momentum transport for a representative section of a disk. We find that the vertical stress is significantly stronger than the radial stress. Using our results in viscous disk simulations with different viscosity coefficients for the radial and vertical direction, we find good agreement with the VSI turbulence for the stresses and meridional flow; this provides additional evidence for the anisotropy. The results are important with respect to the transport of small embedded particles in disks.
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DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
S. Fromang;W. Lyra;F. Masset
通讯作者:
F. Masset
DOI:
10.1051/0004-6361/201527716
发表时间:
2016
期刊:
arXiv: Earth and Planetary Astrophysics
影响因子:
--
作者:
M.H.R.
通讯作者:
M.H.R.
影响因子:
4.8
作者:
Nelson R
通讯作者:
Nelson R
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
A. Philippov;R. Rafikov
通讯作者:
R. Rafikov
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
W. Kley;D. Lin
通讯作者:
D. Lin