Radiative transfer in decomposed domains
Radiative transfer in decomposed domains
复制标题
分解域中的辐射传输
DOI：
10.1051/0004-6361:20053120
复制
发表时间：
2005
影响因子：
6.5
通讯作者：
A. Brandenburg
中科院分区：
文献类型：
--
作者：
T. Heinemann;W. Dobler;W. Dobler;Å. Nordlund;A. Brandenburg
目标。提出了一种在大规模并行计算机上利用区域分解计算辐射传输的有效算法。方法.积分公式的传输方程被用来划分成一个本地的，但计算密集型的部分，用于计算的强度和光学深度积分的问题，和一个非本地的部分，用于相邻处理器之间的强度通信。结果空闲处理器在非本地通信部分的等待时间不会对缩放产生严重影响。因此，挂钟时间几乎与处理器的倒数成线性关系。
Aims. An efficient algorithm for calculating radiative transfer on massively parallel computers using domain decomposition is presented. Methods. The integral formulation of the transfer equation is used to divide the problem into a local but compute-intensive part for calculating the intensity and optical depth integrals, and a nonlocal part for communicating the intensity between adjacent processors. Results. The waiting time of idle processors during the nonlocal communication part does not have a severe impact on the scaling. The wall clock time thus scales nearly linearly with the inverse number of processors.