A 2-GRID ACCELERATION SCHEME FOR THE MULTIGROUP S-N EQUATIONS WITH NEUTRON UPSCATTERING

被引：35
|
作者：
ADAMS, BT [1 ]
MOREL, JE [1 ]
机构：
[1] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545
来源：
NUCLEAR SCIENCE AND ENGINEERING | 1993年 / 115卷 / 03期
关键词：
D O I：
10.13182/NSE115-253
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
A two-grid acceleration scheme for the multigroup S-n equations with neutron upscattering is developed. Although it has been tested only in one-dimensional slab geometry with linear discontinuous spatial differencing, previous experience suggests that it should be applicable in any geometry with any spatial differencing scheme for which an unconditionally efficient diffusion-synthetic acceleration scheme exists. The method is derived, theoretically analyzed, and computationally tested. The results indicate that the scheme is unconditionally effective in terms of error reduction per iteration and highly efficient in terms of computational cost.
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页码：253 / 264
页数：12
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