吸积盘中湍流α参数的最大值
On the Maximal Value of the Turbulent alpha-Parameter in Accretion Discs
摘要：
在这篇简短的论文中，我们表明，使湍流二维而不是三维可能会增加约40%的有效湍流粘度。用这种方法可以得到α max = 0.25Mt^2的无扰动流体动力学粘性参数，它与非定常吸积的观测数据比数值模拟得到的值更符合.然而，从观测中已知的α参数值仍然高出数倍。
英文摘要：
In this short paper we show that making turbulence two- rather than three-dimensional may increase effective turbulent viscosity by about 40%. Dimensionless hydrodynamical viscosity parameter up to α\_{max} = 0.25 M_t^2 may be obtained in this approach, that is in better agreement with the observational data on non-stationary accretion than the values obtained in numerical simulations. However, the α-parameter values known from observations are still several times higher.
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