PHASE-FIELD MODELING OF MOLTEN ZIRCONIUM OXIDATION COUPLED WITH FLOW AND HEAT TRANSPORT

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  • Wang Haoli
    Department of Nuclear Science and Technology, Xi’an Jiaotong University
  • Zhang Yapei
    Department of Nuclear Science and Technology, Xi’an Jiaotong University
  • Tian Wenxi
    Department of Nuclear Science and Technology, Xi’an Jiaotong University
  • Su G.H.
    Department of Nuclear Science and Technology, Xi’an Jiaotong University
  • Qiu Suizheng
    Department of Nuclear Science and Technology, Xi’an Jiaotong University

抄録

<p>A phase-field model coupled with flow and heat transport is developed to study the oxidation of molten Zr alloys. This model uses the phase-field method to capture the convection and diffusion of oxygen in melt and the oxidation reaction between Zr and oxygen to form ZrO2. The phase-field model is verified by comparing it with published one-dimensional oxidation experimental results. The model, which is fully coupled with flow and heat transport, can describe the complex interaction in the process of melt oxidation, including thermal properties variation and oxide crust formation. The results of 2D molten Zr oxidation in oxygen atmosphere simulations show that the melt flow trend strengthens the oxidation kinetics.</p>

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