LOCFES-NL: a tool for testing nonlinear spatial approximations to neutron transport in plane-parallel geometry
Date
1997
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Texas A&M University
Abstract
The Linear One-cell Functional Experimental Studies (LOCFES) suite of codes provides a user with a means of testing and comparing spatial approximations to the monoenergetic, azimuthally symmetric, steady-state, one dimensional transport equation. Prior to the latest addendum described in this thesis, the structure of the codes in this suite necessitated that the functional form for the volumetric flux values depend linearly on the cell's edge flux and source moments. A user supplied set of coefficients for these terms could then be used to specify any linear spatial approximation. While such linear methods represent the bulk of closure approximations, some methods that permit this dependence to be nonlinear have proven to be very effective as well. This thesis is concerned with an addition (LOCFES-NL) to the Linear One-Cell Experimental Studies (LOCFES) suite of transport codes to include support for nonlinear spatial approximations. This latest addition to the suite lets the user implement any method and evaluate the method's performance on user-supplied problems. For illustration, sample computations compare the nonlinear Exponential Method (EM) of Barbucci and Pasquantonio to the Nonlinear Characteristics (NC) Method of Walters and Wareing and to other common linear methods.
Description
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Includes bibliographical references: p. 74-75.
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references: p. 74-75.
Issued also on microfiche from Lange Micrographics.
Keywords
nuclear engineering., Major nuclear engineering.