Title

Thermal Transport At (001) Twist Grain Boundaries in UO2

Abstract

We use phonon wave-packet dynamics to study the phonon transmission at UO2 twist grain boundaries as a function of phonon frequency, mode and incident angle. We find that grain boundaries with more disordered structures show stronger phonon transmission than more ordered grain boundaries. The transmission coefficients are used to calculate the grain boundary thermal conductance at elevated temperature.

Department(s)

Physics

Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Phonons; Disordered Structures; Elevated Temperature; Ordered Grain Boundaries; Phonon Transmissions; Phonon Wave Packets; Thermal Conductance; Transmission Coefficients; Twist Grain Boundary; Grain Boundaries

International Standard Serial Number (ISSN)

223115

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 Elsevier, All rights reserved.


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