Deterministic Phonon Transport Predictions of Thermal Conductivity in Uranium Dioxide With Xenon ImpuritiesSource: Journal of Heat Transfer:;2018:;volume( 140 ):;issue: 005::page 51301Author:Harter, Jackson R.
,
Oliveira, Laura de Sousa
,
Truszkowska, Agnieszka
,
Palmer, Todd S.
,
Alex Greaney, P.
DOI: 10.1115/1.4038554Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We present a method for solving the Boltzmann transport equation (BTE) for phonons by modifying the neutron transport code Rattlesnake which provides a numerically efficient method for solving the BTE in its self-adjoint angular flux (SAAF) form. Using this approach, we have computed the reduction in thermal conductivity of uranium dioxide (UO2) due to the presence of a nanoscale xenon bubble across a range of temperatures. For these simulations, the values of group velocity and phonon mean free path in the UO2 were determined from a combination of experimental heat conduction data and first principles calculations. The same properties for the Xe under the high pressure conditions in the nanoscale bubble were computed using classical molecular dynamics (MD). We compare our approach to the other modern phonon transport calculations, and discuss the benefits of this multiscale approach for thermal conductivity in nuclear fuels under irradiation.
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contributor author | Harter, Jackson R. | |
contributor author | Oliveira, Laura de Sousa | |
contributor author | Truszkowska, Agnieszka | |
contributor author | Palmer, Todd S. | |
contributor author | Alex Greaney, P. | |
date accessioned | 2019-02-28T11:00:47Z | |
date available | 2019-02-28T11:00:47Z | |
date copyright | 1/30/2018 12:00:00 AM | |
date issued | 2018 | |
identifier issn | 0022-1481 | |
identifier other | ht_140_05_051301.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4251715 | |
description abstract | We present a method for solving the Boltzmann transport equation (BTE) for phonons by modifying the neutron transport code Rattlesnake which provides a numerically efficient method for solving the BTE in its self-adjoint angular flux (SAAF) form. Using this approach, we have computed the reduction in thermal conductivity of uranium dioxide (UO2) due to the presence of a nanoscale xenon bubble across a range of temperatures. For these simulations, the values of group velocity and phonon mean free path in the UO2 were determined from a combination of experimental heat conduction data and first principles calculations. The same properties for the Xe under the high pressure conditions in the nanoscale bubble were computed using classical molecular dynamics (MD). We compare our approach to the other modern phonon transport calculations, and discuss the benefits of this multiscale approach for thermal conductivity in nuclear fuels under irradiation. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Deterministic Phonon Transport Predictions of Thermal Conductivity in Uranium Dioxide With Xenon Impurities | |
type | Journal Paper | |
journal volume | 140 | |
journal issue | 5 | |
journal title | Journal of Heat Transfer | |
identifier doi | 10.1115/1.4038554 | |
journal fristpage | 51301 | |
journal lastpage | 051301-11 | |
tree | Journal of Heat Transfer:;2018:;volume( 140 ):;issue: 005 | |
contenttype | Fulltext |