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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Thermal Transport in Crystalline and Non-crystalline Solids: Theory and Experiments
Presentation Title Mesoscale Modeling of Thermal Conductivity of a UO2 and BeO Composite Nuclear Fuel
Author(s) Karim Ahmed, Sean Mcdeavitt
On-Site Speaker (Planned) Karim Ahmed
Abstract Scope A hybrid phase field and finite-element model was developed to simulate the effective thermal conductivity of UO2-BeO nuclear fuel with different microstructural features. The effects of second-phase (BeO) fraction and morphology, temperature, and interface thermal resistance were investigated. The model predicts that the continuous second phase configuration has a higher effective thermal conductivity than the dispersed second phase configuration for the same volume fraction and temperature. Companion experiments were conducted to validate the model predictions. It was demonstrated that accounting for the interface (Kapitza) thermal resistance is necessary to improve the model predictions. The difference between the model calculations and the experimental results were about 5%, which is within the precision of the experimental measurements.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advancing Insights into Phonon Thermal Transport with Theory/experiment Interactions
Determining the Impact of Material Microstructure on the Effective Thermal Conductivity Using Mesoscale Simulation and Modeling
Electronic Structure and Thermal Transport Measurement of GdxSb2-xTe3
Impact of Irradiation Induced Nanoscale Defects on Optical and Thermal Properties of Cerium Dioxide
Influence of Irradiation-induced Microstructural Defects on the Thermal Conductivity of Single Crystal Thorium Dioxide
Investigations of the Thermal Conductivity of UN
Lattice Thermal Conductivity of Quartz at High Pressure and Temperature from the Boltzmann Transport Equation
Mesoscale Modeling of Thermal Conductivity of a UO2 and BeO Composite Nuclear Fuel
Multi-scale Thermal Transport Characterization of Nuclear Fuels
Multi Scale Modeling of the Thermal Conductivity: Combining First Principle Calculations with Monte Carlo
Nano- and Micro-scale Thermal Transport in Swift heavy Ion Irradiated Oxides
Non-linear Thermal Resistance Trend with Increasing Bilayer Density
Nonlinear Stopping of Phonons in Thermoelectric Crystal PbSe
Phonon Dispersion and Linewidth in ThO2 Measured by Neutron Scattering
Physics-guided Machine-Learning Design of Aperiodic Superlattices with Maximum Localization of Coherent Phonons
Structural, Transport, Magnetic, and Thermodynamic Studies of Delta-phase of Uranium
Study of Thermal Transport Properties of Thorium Dioxide Single Crystals
The Degradation of the Thermal Conductivity of Oxide Nuclear Fuel
Thermal Transport in Crystalline Solids with Irradiation-Induced Defects: Computational Modeling and Experiments
Thermal Transport in Nanostructured Crystalline and Disordered Materials
Thermal Transport in ThO2
Thermal Transport Properties of Uranium Aluminides by First-principles

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