Collaborative Study of Solar Turbulent Convection and Differential Rotation

太阳湍流对流与差分旋转的协同研究

• 批准号: 9731676
• 负责人: Juri Toomre
• 金额: $ 43.57万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9731676&HistoricalAwards=false
• 关键词: Collaborative; Study; Solar; Turbulent; Convection

Investigators make detailed numerical simulations of highly turbulent convection in resolving the yield interactions of rotation and convection play in differential rotation in solar-like stars. Such simulations with very high spatial resolution, enabled by the GAFD Turbulence team on new computational codes and procedures, emphasize on different aspects of the physics approximated in a dynamical system as complex as the solar convection zone. The Colorado team employs an anelastic spherical harmonic code, designed to deal with complex flows at high resolution in spherical shells. The Minnesota team uses a fully compressible Piecewise-Parabolic Method code, where an entire rotating star with a convective envelope is placed in the middle of a very fin uniform Cartesian grid. Both allow magnetic field effects to be included, as well, to prospectively study magnetic dynamo processes taking place deep in the convection zone, and effects visible near the stellar surface.

研究人员对高湍流对流进行了详细的数值模拟，以解决在类太阳恒星的微分旋转中旋转和对流的产量相互作用。这种高空间分辨率的模拟，由GAFD湍流团队在新的计算代码和程序上实现，强调了在像太阳对流区这样复杂的动力系统中近似的物理的不同方面。科罗拉多大学的研究小组采用了一种非弹性球面谐波编码，旨在以高分辨率处理球壳中的复杂流动。明尼苏达的研究小组使用了一种完全可压缩的分段抛物线方法代码，其中一个带有对流包络的旋转恒星被放置在一个非常均匀的笛卡尔网格的中间。两者都允许将磁场效应包括在内，以前瞻性地研究发生在对流区深处的磁发电机过程，以及在恒星表面附近可见的影响。