超颗粒尺度连接模拟
Supergranulation Scale Connection Simulations
摘要：
超颗粒（96毫米宽20毫米深）的尺度上的太阳表面对流的现实模拟结果。模拟只覆盖了太阳对流区几何深度的10%，但它的压力标度高度的一半。它们包括氢、第一和大部分第二氦电离区。水平速度谱呈幂律分布，主要对流单体的水平尺度随深度增加而增大。对流是由浮力功驱动的，浮力功在靠近表面处最大，但在整个区域内都很重要。接近表面的浮力驱动由动能通量的发散来平衡，但在更深处，它由耗散来平衡。湍流动能的阻尼长度为4个压力标度高度。质量混合长度为1.8标度高度。三分之二的区域是向上流动的流体，除了非常接近表面。内部（电离）能通量是对流通量的最大贡献者的温度低于40,000 K和热能通量是最大的贡献者在较高的温度。该数据集对于验证当地日震反演方法是有用的。在steinr.msu.edu/tubob/96averages/idl保存文件中，可以获得16小时的数据，作为4小时平均值，2小时节奏。存储的变量是密度、温度、声速和三个速度分量。此外，在平均连续光学厚度单位以上200公里处的三个速度分量在30秒时可用。节奏
英文摘要：
Results of realistic simulations of solar surface convection on the scale of supergranules (96 Mm wide by 20 Mm deep) are presented. The simulations cover only 10% of the geometric depth of the solar convection zone, but half its pressure scale heights. They include the hydrogen, first and most of the second helium ionization zones. The horizontal velocity spectrum is a power law and the horizontal size of the dominant convective cells increases with increasing depth. Convection is driven by buoyancy work which is largest close to the surface, but significant over the entire domain. Close to the surface buoyancy driving is balanced by the divergence of the kinetic energy flux, but deeper down it is balanced by dissipation. The damping length of the turbulent kinetic energy is 4 pressure scale heights. The mass mixing length is 1.8 scale heights. Two thirds of the area is upflowing fluid except very close to the surface. The internal (ionization) energy flux is the largest contributor to the convective flux for temperatures less than 40,000 K and the thermal energy flux is the largest contributor at higher temperatures. This data set is useful for validating local helioseismic inversion methods. Sixteen hours of data are available as four hour averages, with two hour cadence, at steinr.msu.edu/~bob/96averages, as idl save files. The variables stored are the density, temperature, sound speed, and three velocity components. In addition, the three velocity components at 200 km above mean continuum optical depth unity are available at 30 sec. cadence.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
