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首页> 外文期刊>Annals of nuclear energy >DISCONTINUOUS FINITE ELEMENT SOLUTIONS FOR NEUTRON TRANSPORT IN X-Y GEOMETRY
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DISCONTINUOUS FINITE ELEMENT SOLUTIONS FOR NEUTRON TRANSPORT IN X-Y GEOMETRY

机译:X-Y几何中子传输的不连续有限元解

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摘要

A finite element method of composite solutions is described for the even-parity transport equation which uses a high order spherical harmonic expansions for the directional component of transport where they are needed and not everywhere as in established finite element methods. Previously in the method of composite solution trial functions were needed for both even and odd parity angular fluxes. For some problems there is a small saving in the number of unknowns used to specify a variational solution but for others savings of the order of 70% can be achived. The method is illustrated by numerical solutions in two dimensions for a Fletcher test problem, a PWR cell problem of Natelson and a problem of a quarter of a reactor with three control rods.
机译:对于偶数奇偶传输方程,描述了一种复合解决方案的有限元方法,该方程使用高阶球谐展开来表示需要定向的传输方向分量,而不是像已建立的有限元方法那样无处不在。以前,在复合解方法中,偶数和奇数奇偶校验角通量都需要试验函数。对于某些问题,用于指定变分解的未知数的节省很少,但是对于其他一些问题,可以节省70%的数量级。对于弗莱彻测试问题,纳特森的PWR电池问题和四分之三带有三个控制棒的反应堆问题,通过二维数值解来说明该方法。

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