PhD Defence of Luiz Pereira
30 October 2020
Luiz Pereira defends his PhD in Numerical Mechanics and Marerials on Nov. 12th, 2020.
He worked on the mechanisms of oxygen bubble formation in a glass melt in the nuclear waste vitrification context.
His thesis was supervised by Franck Pigeonneau, CFL team in the framework of a project with CEA.
Abstract of his work:
The objective of this project is to determine quantitative parameters inducing the bubble nucleation (gas solubility, supersaturation and nucleation). The impact of the molten glass composition (redox) and temperature will be deeply investigated. Moreover, the role of heterogeneities present in the melt and which may promote nucleation phenomena will be considered. A specific experimental set-up will be implemented in order to in-situ monitor the bubbles formation associated with a molten glass redox state measurement. Post-mortem analyzes on the solidified material will also be performed (electronic microscopy, gas analyzes). In a second step, a basic modelling of the bubble nucleation may be considered using the previously acquired experimental results.
Keywords:
- Oxide melt
- Bubbles
- Redox reaction
- Experimental approach
- Numerical approach
On the left, a population of bubbles in a borosilicate melt at 1200°c, in situ camera imaging device
On the right,a population of bubbles in a borosilicate melt at 1050°c, optical microscopy
Découvrir les autres actualités liées
Metallurgical evolution of Zr-Nb alloys during hot deformation processes: mechanisms understanding and simulations
Pauline Hahn conducted her doctoral studies in the MSR team under the […]
On randomized linear algebra methods for solving large scale linear systems in computational mechanics
Wael Bader have conducted his doctoral research in the CFL team under the supervision of […]
Wire laser additive manufacturing (WLAM): a multiphysics numerical simulation of heat transfer, fluid flow, and microstructure formation. Application to IN718 superalloy
Zichen Kong conducted […]
Hiba Bouras is in her third year of doctoral studies in the S&P team. She is conducting her research under the supervision of Tatiana Budtova, Yannick Tillier and Sytze Buwalda, as part of a […]
Multiphysics Track-Scale Simulation of L-PBF 316L Additive Manufacturing: Thermo-Fluid Flow, Grain Growth, and Crystal Viscoplasticity
Zixuan Li conducted his doctoral research in the 2MS team […]
Characterization and modeling of cold multi-pass drawing of thick sheet applied to naval structures
Joséphine Chatellier conducted her doctoral research in the CSM team under the supervision […]