Pseudospectral apparent horizon finders: An efficient new algorithm

Pseudospectral apparent horizon finders: An efficient new algorithm
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伪光谱表观地平线探测器:一种高效的新算法

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发表时间:
1997
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通讯作者:
C. Gundlach
C. Gundlach
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作者:
C. Gundlach

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本文讨论了在柯西数据(?,gab,Kab)在三维空间中没有对称性。我们描述了一族算法,其中包括中村等人的伪谱视层位探测器和Tod提出的曲率流方法作为特例。我们建议,在家庭中的其他算法可能会联合收割机的速度与后者的鲁棒性。本文给出了一种在直角坐标系下的网格上的柯西数据的数值实现方法,并在Brill-Lindquist和Kerr初始数据上进行了检验。新算法比以前的算法更快,更强大。
We review the problem of finding an apparent horizon in Cauchy data (?,gab,Kab) in three space dimensions without symmetries. We describe a family of algorithms which includes the pseudospectral apparent horizon finder of Nakamura et al. and the curvature flow method proposed by Tod as special cases. We suggest that other algorithms in the family may combine the speed of the former with the robustness of the latter. A numerical implementation for Cauchy data given on a grid in Cartesian coordinates is described, and tested on Brill-Lindquist and Kerr initial data. The new algorithm appears faster and more robust than previous ones.