本文選題：并行計算 + 有限元方法　； 參考：《天文學進展》2013年02期

【摘要】：波江座α是一顆具有代表性并被比較充分觀測的快速自轉恒星。以該星為例,建立了一種可以利用有限的觀測數(shù)據(jù)有效反演此類恒星橢球形狀及其內部結構的并行數(shù)值方法。求解此問題的經典近似方法 (一般)只對慢速旋轉的恒星有效,需要對旋轉角速度作小擾動假設;而該方法為嚴格數(shù)值求解恒星的旋轉多方球模型,對快速旋轉的情形仍然保持有效。該方法采用的大規(guī)模并行有限元方法,對超級計算設備的性能與計算方法實現(xiàn)的效率都有很高的需求。計算表明,如果有限元網格包含數(shù)千萬單元水平,則經過充分內存優(yōu)化的代碼在上海超級計算中心曙光5000A超級計算機上運行需要不少于1024核的資源。
[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.
【作者單位】： Department
【基金】：上海市科學技術委員會(1201H116400)
【分類號】：P145.4

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本文編號：2004192