Application of the variational method using discontinuous trial functions for the two-region neutron transport problem
作者:
J.B. Doshi,
期刊:
Transport Theory and Statistical Physics
(Taylor Available online 1983)
卷期:
Volume 12,
issue 1
页码: 1-33
ISSN:0041-1450
年代: 1983
DOI:10.1080/00411458308212730
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A method is developed using the variational principle to solve a two-region, monoenergetic, one-dimensional transport problem arising in the calculation of the neutron flux-distortion factor. The Roussopoulos functional for the problem is modified with the help of a Lagrangian multiplier accommodating the interface conditions. The complete set of Case eigen-functions in each region are selected as the trial functions. The stationarity condition of the modified functional leads to a decoupled set of equations for each set of unknown coefficients. These are solved using Gauss quadrature to approximate integrals. Two problems are solved using the formalism developed; the problem of computing the flux-depression due to a foil placed in a medium with a constant source, and the problem of evaluating the flux-distortion due to a foil placed in an exponentially varying flux. The results are compared with the previously reported values and excellent agreement is observed.
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