Article ID Journal Published Year Pages File Type
8044535 Vacuum 2018 31 Pages PDF
Abstract
Development of new techniques for detection and analysis of xenon/krypton mixtures is significant for both industrial and environmental purposes. In this research, direct simulation Monte Carlo is applied to analysis Xenon/Krypton gas mixtures through different molecular forces inside a new micro gas sensor (MIKRA). In this device, a temperature difference inside a rectangular enclosure with heat and cold arms as the non-isothermal walls induces a molecular force known as Knudsen force at low pressure condition. This force is proportional to the main characteristics of the gas mixture. In order to simulate a rarefied gas inside the micro gas detector, Boltzmann equations are applied to obtain high precision results. To solve these equations, Direct Simulation Monte Carlo (DSMC) approach is used as a robust method for the non-equilibrium flow field. In this research, the effect of various concentrations of the Xenon/Krypton gas mixtures on force generation is comprehensively studied. Our findings show that value of generated Knudsen force significantly different when the fraction of each component in Xenon/Krypton gas mixtures is varied. This indicates that this micro gas sensor could precisely detect the concentration of Xenon/Krypton gas mixtures in a low-pressure environment. In addition, the obtained results demonstrate that the mechanism of force generation highly varies in the different pressure conditions.
Related Topics
Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
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