波江座α的快速自转多方球模型

发布时间：2018-06-10 18:32

本文选题：并行计算 + 有限元方法　；参考：《天文学进展》2013年02期

【摘要】：波江座α是一颗具有代表性并被比较充分观测的快速自转恒星。以该星为例,建立了一种可以利用有限的观测数据有效反演此类恒星椭球形状及其内部结构的并行数值方法。求解此问题的经典近似方法 (一般)只对慢速旋转的恒星有效,需要对旋转角速度作小扰动假设;而该方法为严格数值求解恒星的旋转多方球模型,对快速旋转的情形仍然保持有效。该方法采用的大规模并行有限元方法,对超级计算设备的性能与计算方法实现的效率都有很高的需求。计算表明,如果有限元网格包含数千万单元水平,则经过充分内存优化的代码在上海超级计算中心曙光5000A超级计算机上运行需要不少于1024核的资源。
[Abstract]:The constellation a is a representative and fully observed fast rotating star. Taking the star as an example, a parallel numerical method is developed to effectively inverse the ellipsoid shape and its internal structure of this kind of star using limited observational data. The classical approximate method for solving this problem is effective only for slowly rotating stars, and requires a small perturbation assumption of rotation angular velocity, and the method is a strict numerical solution to the rotating multi-sphere model of stars. It is still valid for fast rotation. The large scale parallel finite element method used in this method has a high demand for the performance of supercomputing equipment and the efficiency of the calculation method. The calculation shows that if the finite element mesh contains tens of millions of elements, the code with sufficient memory optimization needs no less than 1024 cores to run on the dawning 5000A supercomputer of Shanghai supercomputing center.
【作者单位】： Department
【基金】：上海市科学技术委员会(1201H116400)
【分类号】：P145.4

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