Modeling and Simulation of the Pressure Field in the Association of Cylindrical-Conical-Cylindrical Tubes in High and Ultra-high Vacuum
Analytical and numerical calculations are presented to obtain the pressure field and its gradient along a series association of cylindrical, conical, and cylindrical tubes. The phenomenon of gas transport is assumed to be a diffusion process that occurs in a molecular regime, a fact that is observed...
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Published in | Brazilian journal of physics Vol. 53; no. 6 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.12.2023
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Analytical and numerical calculations are presented to obtain the pressure field and its gradient along a series association of cylindrical, conical, and cylindrical tubes. The phenomenon of gas transport is assumed to be a diffusion process that occurs in a molecular regime, a fact that is observed, in general, in systems under high vacuum, ultra-high vacuum, and extremely high vacuum. The pressure field, in addition to being calculated as a solution to the diffusion equation, was also obtained by the Monte Carlo method by simulation using the Molflow program; both solutions were obtained under the same geometric and physical conditions (outgassing rates of the tubes and effective pumping speeds). The comparison of the results of the two methodologies showed excellent agreement, evidencing the confidence in the presented analytical method. The calculation of the total throughput by different routes was implemented as a consistency test of the methodology, and a discussion of the modeling achievements is systematically presented. |
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ISSN: | 0103-9733 1678-4448 |
DOI: | 10.1007/s13538-023-01361-2 |