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Mixed-dual implementations of the simplified P_n method

机译:简化的P_n方法的混合双重实现

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摘要

We present implementations of the Raviart-Thomas finite element method for solving the simplified P_n approximation of the transport equation in 3-D geometries. This method can be applied to the full-core simulation of nuclear reactors with a regular Cartesian or hexagonal mesh. The Raviart-Thomas and Rav-iart-Thomas-Schneider methods are assuming a domain with Cartesian and hexagonal meshes, respectively. The Raviart-Thomas-Schneider method is based on a dual variational formulation defined over lozenge elements with a Piola transformation of the polynomial basis. An efficient ADI numerical technique was set up to solve the resulting matrix system. Validation results are given for selected benchmarks in 2- and 3-D geometry.
机译:我们介绍了Raviart-Thomas有限元方法的实现,用于解决3-D几何形状中输运方程的简化P_n逼近。该方法可应用于具有规则笛卡尔或六边形网格的核反应堆的全核仿真。 Raviart-Thomas和Rav-iart-Thomas-Schneider方法分别假定具有笛卡尔网格和六边形网格的域。 Raviart-Thomas-Schneider方法基于对菱形元素定义的对偶变分公式,并采用多项式的Piola变换。建立了一种有效的ADI数值技术来求解所得矩阵系统。给出了选定的2D和3D几何基准的验证结果。

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  • 来源
    《Annals of nuclear energy》 |2010年第4期|p.498-511|共14页
  • 作者

    Alain Hebert;

  • 作者单位

    Institut de Ginie Nucleate, Ecole Polytechnique de Montreal, P.O. Box 6079, Station 'Centre-Ville' Montreal, Quebec, Canada H3C 3A7;

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