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John H. Mahaffy

Researcher at Pennsylvania State University

Publications -  21
Citations -  233

John H. Mahaffy is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Numerical diffusion & Heat transfer. The author has an hindex of 7, co-authored 21 publications receiving 210 citations. Previous affiliations of John H. Mahaffy include Nuclear Regulatory Commission.

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Notes on the implementation of a fully-implicit numerical scheme for a two-phase three-field flow model

TL;DR: The objective of this paper is to capture as much as possible, the lessons learned during the development and coding of the fully-implicit two-phase three-field model.
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Numerics of codes: stability, diffusion, and convergence

TL;DR: In this paper, the numerical methods used in the primary US reactor safety codes are summarized and the basic Courant-type stability limits for these codes are reviewed, and more subtle stability problems arising from the explicit evaluation of various friction and heat-transfer coefficients are discussed.
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Implementation and evaluation of one-group interfacial area transport equation in TRACE

TL;DR: In this article, the authors implemented the one-dimensional interfacial area transport equation into the TRACE code, being developed by the U.S. Nuclear Regulatory Commission (NRC).
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On the automated assessment of nuclear reactor systems code accuracy

TL;DR: The goal of the survey was to identify needs, issues and techniques to be considered in the development of an automated code assessment procedure, to be used in United States Nuclear Regulatory Commission (NRC) advanced thermal–hydraulic T/H code consolidation efforts.
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Implementation and assessment of high-resolution numerical methods in TRACE

TL;DR: It is found that VA and MUSCL work best among of the six flux limiters in TRACE, both of them not only have better numerical accuracy than the 1st-order upwind scheme but also preserve great robustness and efficiency.