Nuclear Technology and Energy

Modeling and simulation of gas behavior with DSMC method and calculating the separation parameters inside a gas centrifuge

https://doi.org/10.48308/nucte.2022.101203
Volume 1, Issue 3 - Serial Number 3
Autumn 2022
Pages 26-35
Nuclear Technology and Energy

Authors

masoud khajenoori 1
Jaber Safdari 2
Ali Norouzi 1
Sadegh Yousefi-Nasab 2
Mohammad Hassan Mallah 2

1 Atomic Energy Organization of Iran, Iran Advanced Technologies Company

2 Atomic Energy Organization of Iran, Nuclear Science and Technology Research Institute, Material and Nuclear Fuel Research School

Abstract
The gas behavior within a centrifuge machine could be divided into molecular and continuum. The Boltzmann equation solving is a precise method in the molecular region (feed entrance area). DSMC method is one of the Boltzmann equation solving methods. So far, the mass source used in the Onsager-Pancake equation in the continuum region has been an assumed source and many researches have presented a different assumed mass source. In the present paper, it has been calculated feed reaching form to continuum region and its effect on the border between the two areas in the mass source form using direct Monte-Carlo method. It has been compared the mass source obtained from the DSMC method with the assumed mass source. Besides calculating the exact mass function using DSMC method in the present work, it has been obtained the flow function through substituting in the heterogeneous Onsager-Pancake equations and solving the equations by finite differential method. Afterwards, it has been calculated the separation parameters through substituting this flow function in the concentration equations. The difference between the amount of separation work by the combined method and the reference value is 7.97%.

Keywords

Molecular and continuous region
Mass source
DSMC
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