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Fast elliptic solvers and three-dimensional fluid-structure interactions in a pressurized water reactor

Schumann, U. (1980) Fast elliptic solvers and three-dimensional fluid-structure interactions in a pressurized water reactor. Journal of Computational Physics, 36, pp. 93-127. DOI: 10.1016/0021-9991(80)90176-X.

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Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/622866/description#description

Abstract

A numerical method is described for analysis of the response of internal structures in the vessel of a pressurized water reactor to a sudden depressurization (“blowdown”). The three-dimensional geometry and fluid-structure interactions are taken into account. Potential flow is assumed for a compressible fluid with constant speed of sound which is appropriate for subcooled water. Any linear-elastic dynamic model in terms of a finite number of degrees of freedom can be employed for the internal structure, in particular the core barrel; here the model “CYLDY2” is implemented. An implicit and stable time-differencing scheme is used. Spatially, finite differences or spectral approximations are introduced. The resultant set of linear equations is solved efficiently by means of fast elliptic solvers and the capacitance, or influence, matrix technique. The resultant code, FLUX2, is applied to predict the dynamics in case of the planned HDR experiment. A sensitivity analysis shows that truncation errors can be kept sufficiently small. By comparison of results with and without fluid-structure interactions it is found that the coupling has an essential effect on the resultant maximum stress.

Document Type:Article
Title:Fast elliptic solvers and three-dimensional fluid-structure interactions in a pressurized water reactor
Authors:
AuthorsInstitution or Email of Authors
Schumann, U.Kernforschungszentrum Karlsruhe
Date:1980
Journal or Publication Title:Journal of Computational Physics
Volume:36
DOI:10.1016/0021-9991(80)90176-X
Page Range:pp. 93-127
Status:Published
Keywords:blowdown, CYLDY2, FLUX2
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: Jana Freund
Deposited On:26 Nov 2008
Last Modified:12 Dec 2013 20:30

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