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首页> 外文期刊>Journal of Heat Transfer >Diffusion Layer Modeling for Condensation With Multicomponent Noncondensable Gasses
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Diffusion Layer Modeling for Condensation With Multicomponent Noncondensable Gasses

机译:多组分不凝性气体冷凝的扩散层建模

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摘要

Many condensation problems involving noncondensable gases have multiple noncondens- able species, for example, air (with nitrogen, oxygen, and other gases); and other prob- lems where light gases like hydrogen may mix with heavier gases like nitrogen. Particu- larly when the binary mass diffusion coefficients of the noncondensable species are substantially different, the noncondensable species tend to segregate in the condensation boundary layer. This paper presents a fundamental analysis of the mass transport with multiple noncondensable species, identifying a simple method to calculate on effective mass diffusion coefficient that can be used with the simple diffusion layer model. The results are illustrated with quantitative examples to demonstrate the potential importance of multicomponent noncondensable gas effects.
机译:许多涉及不可冷凝气体的冷凝问题具有多种不可冷凝物质,例如,空气(含氮气,氧气和其他气体)。以及诸如氢气之类的轻气体可能与诸如氮气之类的较重气体混合的其他问题。特别是当不可冷凝物质的二元质量扩散系数显着不同时,不可冷凝物质倾向于在冷凝边界层中偏析。本文介绍了具有多个不可凝结物质的传质的基础分析,确定了一种可用于计算简单扩散层模型的有效质量扩散系数的简单方法。通过定量示例说明了结果,以证明多组分不可冷凝气体效应的潜在重要性。

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