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- W2978596651 abstract "In this study, the applicability of the Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) coupling algorithm to the sedimentation of solid particles in a liquid pool was performed. This phenomenon is important because it is related with the issue of ex-vessel debris coolability during a severe accident. The numerical model was validated by comparing with the experiment of scaled condition. A total of eight experimental cases with particle densities of 3600, 6000, and 7800 kg/m3; nozzle inlet diameters of 20, 30, and 40 mm; and the particle diameters of 2, 4, and 6 mm were considered. The analysis focused on the characteristics of particle falling (particle falling time, and average particle velocity) and that of particle bed formation (maximum bed height, bed height distribution, dimple area, and dimple volume). The numerical results showed good agreements with the experimental data, while the deviation was shown for the case for a large ratio of the nozzle inlet diameter to the particle diameter due to the overestimation of particle momentum. The result indicated that consideration for fluid flow and three-dimensional analysis should be considered in numerical simulation for the better prediction of the debris particle sedimentation. Therefore, the CFD-DEM algorithm, which can simulate the local phenomenon of particle sedimentation, can be considered as a good method to reduce the uncertainty in the cooling of ex-vessel debris bed." @default.
- W2978596651 created "2019-10-10" @default.
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- W2978596651 date "2019-12-01" @default.
- W2978596651 modified "2023-10-15" @default.
- W2978596651 title "Numerical validation and investigation for the sedimentation of solid particles in liquid pool using the CFD-DEM coupling algorithm" @default.
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- W2978596651 doi "https://doi.org/10.1016/j.nucengdes.2019.110364" @default.
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