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MATHEMATICAL MODEL OF URANIUM HEXAFLUORIDE DESUBLIMATION

A. A. Orlov, A. F. Tsimbalyuk, R. V. Malyugin
VANT. Ser.: Mat. Mod. Fiz. Proc 2016. Вып.2. С. 75-83.

The paper presents a nonstationary mathematical model of the UF6 desublimation in a vertical storage vessel regarding the convection and UF6 desublimation on a bottom wall, as well as the ellipticity of the upper and lower walls of the vessel. Simulation results are presented for the linear desublimation rate, thickness of a solid layer, temperature distribution in the vessel wall-desublimate layer system, and dynamics of filling out the 2,5 m3 cylindrical vessel with solid UF6 as functions of time.

Keywords: uranium hexafluoride, desublimation, mathematical model, heat-and-mass transport, nonstationary process, gas dynamics, Stephen problem, a mobile grid, SIMPLE algorithm, iteration-interpolation method.







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