Investigation of the continuum-rarefied flow and isotope separation using a hybrid CFD-DSMC simulation for UF6 in a gas centrifuge

Ghazanfari, V ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.anucene.2020.107985
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. UF6 gas flow in the total regions of a rotor with the radius of 0.1 m and the length of 1 m in axisymmetric and steady states was simulated using a new hybrid CFD-DSMC method in the OpenFOAM framework. Implicit coupled density-based scheme was performed for CFD method, and Variable Hard Sphere (VHS) and diffuse model were employed in DSMC method. Also, as an initial estimation, the local Knudsen number was applied to determine the interface location between the continuum-rarefied regions (r = 0.0855 m). Then it was modified (r = 0.084 m) to reduce the computational cost. The comparison results of pure CFD and CFD-DSMC methods illustrated that there were large differences between the flow properties in the rarefied regions. Finally, the results showed that the separation factor of 6.5% and the separation power of 9.5% were different. © 2020 Elsevier Ltd
  6. Keywords:
  7. Flow of gases ; Uranium compounds ; Comparison result ; Computational costs ; Flow properties ; Initial estimation ; Interface locations ; Isotope separation ; Separation factors ; Separation power ; Computational fluid dynamics
  8. Source: Annals of Nuclear Energy ; Volume 152 , 2021 ; 03064549 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0306454920306812