论文标题
研究角动量传输对空间尺度构造差异旋转的依赖性的研究
Investigation of the dependence of angular momentum transport on spatial scales for construction of differential rotation
论文作者
论文摘要
我们研究了角动量转运（AMT）对空间尺度的依赖性，并使用太阳样恒星的数值模拟。据认为，湍流在构建太阳差旋转（DR）中具有至关重要的作用。在一种广泛使用的方法来分析DR的构建机理中，该流量分为两个组成部分，“平均流动”和“湍流”，其中“湍流”包括广泛的空间尺度。预计AMT的特征将取决于规模。在这项研究中，我们分解了角动量通量（AMF），以研究AMF对空间尺度的依赖性。我们将结果与抗 - 极（快速极点）和太阳能（快速赤道）DR进行了比较。我们的结论总结为1。在旋转受限的系统中，大规模看到径向向外AMT（60 mm <l <120 mm）。 2。即使刻度集成的AMF为负，我们有时会在某些尺度上观察到正AMF。 3。小规模的湍流倾向于向内运输角动量，并引起抗极性DR，这表明高分辨率模拟是太阳样DR的负因子。我们分解AMF的方法可深入了解DR的角动量和构造机制。
We investigate the dependence of the angular momentum transport (AMT) on the spatial scales with numerical simulation of solar-like stars. It is thought that turbulence has an essential role in constructing solar differential rotation (DR). In a widely used method to analyse the construction mechanism of DR, the flow is divided into two components, `mean flow' and `turbulence', where `turbulence' includes a broad spectrum of spatial scales. The features of the AMT are expected to depend on the scale. In this study, we decompose the angular momentum flux (AMF) to investigate the dependence of the AMF on the spatial scale. We compare the results with anti-solar- (fast pole) and solar-type (fast equator) DR. Our conclusions are summarized as 1. Radially outward AMT is seen on a large scale (60 Mm < L <120 Mm) in rotationally constrained systems. 2. Even when the scale-integrated AMF is negative, we sometimes observe positive AMF on certain scales. 3. Small-scale turbulence tends to transport the angular momentum radially inward and causes the anti-solar DR, indicating that high-resolution simulation is a negative factor for solar-like DR. Our method to decompose the AMF provides a deep understanding of the angular momentum and construction mechanism of DR.
