On mass transport in nonviscous, non-self-gravitating fluid disks
On mass transport in nonviscous, non-self-gravitating fluid disks
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关于非粘性、非自重力流体盘中的质量传递
DOI：
10.1086/169277
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
S. Lubow
中科院分区：
文献类型：
--
作者：
S. Lubow
本文利用相对盘厚和相对势摄动强度这两个小参数的存在，对正压、非粘性、非自重力二维流体盘中轻度非轴对称扰动势诱导质量流进行了分析。结果表明，质量流既有共振贡献，也有非共振贡献。旋转时的朗道阻尼会在流体中产生一个扭矩，作为响应，压力会导致角动量平流。对于代表紧密包裹的螺旋星系的参数，共振质量通量与粘性应力和冲击引起的质量通量大致相当。参21。
The present analysis of a mild nonaxisymmetric perturbing potential-induced mass flow in a barotropic, nonviscous, nonself-gravitating two-dimensional fluid disk, proceeds by taking advantage of the existence of two small parameters: the relative disk thickness and the relative potential perturbation strength. It is shown that mass flow contains both a resonant and a nonresonant contribution. Landau damping at corotation creates a torque in the fluid, in response to which pressure forces cause angular momentum to be advected. For parameters representative of tightly wrapped spiral galaxies, the resonant mass flux is approximately comparable to the mass flux due to viscous stresses and shocks. 21 refs.