Thermal Transport At (001) Twist Grain Boundaries in UO2
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.
B. Deng et al., "Thermal Transport At (001) Twist Grain Boundaries in UO2," Journal of Nuclear Materials, vol. 479, pp. 167-173, Elsevier, Oct 2016.
The definitive version is available at https://doi.org/10.1016/j.jnucmat.2016.06.054
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)
Article - Journal
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