Simulation and validation of a multiphase flow of hydriding ejecta particles*

A hydride model for solid ejecta particles has been developed and presented previously with minimal validation [Regele, J. D., Schwarzkopf, J. D., Buttler, W. T., Harrison, A. K., A simple hydride model for cerium ejecta particles, 72nd Annual Meeting of the APS Division of Fluid Dynamics, Seattle, WA 2019]. That model is revisited here with more detailed validation by simulating the experiment which motivated the model's development and analyzing the entire multiphase flow field as is done in the experiment. A detailed comparison of the total ejecta mass produced, particle sizes, velocities and particle temperatures is performed to validate the hydriding particle model. The challenges with temperature validation are highlighted and different techniques for mitigating these issues are discussed.