SHERP

Stabilization techniques for the nonlinear analytic nodal method

Cited 0 time in webofscience Cited 0 time in scopus
Authors
Joo, Han Gyu; Jiang, Guibing; Downar, Thomas J.
Issue Date
1998-09-01
Publisher
American Nuclear Society
Citation
Nucl. Sci. Eng., 130, 47 (1998)
Keywords
Analytic Nodal MethodInstabilityHybridNonlinear Nodal
Abstract
The nonlinear analytic nodal method, which is formulated by combining the nonlinear iteration technique and the analytic nodal method (ANM). requires analytic solutions of the two-node problems. When the method is applied to problems that contain near-critical nodes in which there is essentially no net leakage, the two-node ANM solution for such nodes result in highly ill-conditioned matrices and potential numerical instabilities, especially in single precision arithmetic. Two stabilization techniques are introduced to resolve the instability problem by employing alternate basis functions for near-critical nudes. The first uses the exact ANM solution for a critical node, and the second employs the nodal expansion method. Both techniques are shown to perform well; however, the solution accuracy can be mildly sensitive to the criterion used to invoke the stabilized coupling kernel.
ISSN
0029-5639
Language
English
URI
http://hdl.handle.net/10371/9629
Files in This Item:
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Energy Systems Engineering (에너지시스템공학부)Nuclear Engineering (원자핵공학전공)Journal Papers (저널논문_원자핵공학과)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse