径向粘滞力对薄盘稳定性的影响

The Effect of Radial Viscous Force on the Stability of a Thin Accretion Disk

在吸积盘内由于吸积物质的径向运动，盘内物质间沿径向的粘滞力将会对盘的性质产生一定影响．本文计算了等温吸积盘中（考虑径向粘滞力）的不稳定性问题，对所求得的色散方程的分析表明，径向粘滞力将使吸积盘趋向稳定。本文还对径向粘滞力对盘的稳定性的影响作了物理解释，并发现径向粘滞力的引入不会引入新的稳定或不稳定模式。

The stability of an isothermal thin disk with radial viscous force is analyzed.The derived dispersion relation indicates that radial viscous force tends to stabilize the disk. This may be explained by its dissipation effect on the energy of the wave propagation. It is also found that the introduction of radial viscous force will not give rise to any new mode.