Analysis of Non-linear Feedback in Space-time Reactor Dynamics by Finite-element Methods
Author : Mahmoud Ahmad Salehi
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Page : 624 pages
File Size : 31,67 MB
Release : 1983
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Author : Mahmoud Ahmad Salehi
Publisher :
Page : 624 pages
File Size : 31,67 MB
Release : 1983
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Author : Reza Khazaneh
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Page : 344 pages
File Size : 16,50 MB
Release : 1974
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Page : 764 pages
File Size : 29,37 MB
Release : 1975
Category : Nuclear energy
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Author : Joseph M. Harrer
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Page : 1052 pages
File Size : 40,63 MB
Release : 1973
Category : Technology & Engineering
ISBN : 9780870790058
Author : Ali Meghdari
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Page : 540 pages
File Size : 20,49 MB
Release : 1992
Category : Mechanical engineering
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Page : pages
File Size : 15,46 MB
Release : 1971
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Page : 376 pages
File Size : 50,76 MB
Release : 1995
Category : Aeronautics
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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Page : 368 pages
File Size : 17,11 MB
Release : 1990
Category : Large space structures (Astronautics)
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Page : 12 pages
File Size : 26,27 MB
Release : 1991
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There are many reports about nodal methods for static and dynamic problems, but not many for the nonlinear feedback cases. In this paper, a class of nodal methods called ''mathematical nodal method'' (MNM) is studied with the temperature feedback problems. The spatially complex domain of the problem is represented as a collection of geometrically simple subdomains of the size of fuel assemblies called nodes. Over each node, the time dependent coefficients of the neutron flux, precursor concentrations, fuel and coolant temperatures are the surface and volume weighted average (moment) values of the unknown solutions; the space dependent basis functions are a combination of Legendre polynomials. If the material parameters are a linear function of fuel and coolant temperatures, the coupled equations can be put in a dimensionless form and a system of time dependent ordinary differential equations containing nonlinear feedback terms is obtained. These nonlinear feedback terms are updated at each time step during the time iteration process. Results of some benchmark problems are included in this report.
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Page : 532 pages
File Size : 10,3 MB
Release : 1987
Category : Dissertation abstracts
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