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	Effect of denseness on the similarity between micro and rarefied gas flows
	Lan Xudong ; Li Zhixin
	2010-10-12 ; 2010-10-12
关键词	Theoretical or Mathematical/ Knudsen flow Mach number microfluidics/ rarefied gas flows Enskog dense gas theory gas density Knudsen number Reynolds number Mach number microflow transport coefficients relative sound velocity thermodynamics analysis/ A4745 Rarefied gas dynamics A4740 Compressible flows shock and detonation phenomena A4785 Applied fluid mechanics
中文摘要	The similarity conditions for micro and rarefied gas flows were analyzed based on Enskog's dense gas theory, by investigating the influence of the gas densities on the physical properties and flow parameters. The results show that if the influence of the gas density on the physical properties and flow parameters has to be considered, the three dimensionless parameters (Kn, Re, and Ma), which define the similarity between the micro and rarefied gas flows, can not all simultaneously be equal and, thus the micro and rarefied gas flows cannot be similar. The effects of dense gases on the flow parameters and transport coefficients were studied, with recommended density limitations for different gases calculated using dense gas theory with relative sound velocity deviations of 5% and relative pressure deviations of 0. 5% based on thermodynamics analyses. If the gas density is larger than the limit, the similarity between the micro and rarefied gas flows breaks down.
语种	中文
出版者	Tsinghua University Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78963]
专题	清华大学
推荐引用方式 GB/T 7714	Lan Xudong,Li Zhixin. Effect of denseness on the similarity between micro and rarefied gas flows[J],2010, 2010.
APA	Lan Xudong,&Li Zhixin.(2010).Effect of denseness on the similarity between micro and rarefied gas flows..
MLA	Lan Xudong,et al."Effect of denseness on the similarity between micro and rarefied gas flows".(2010).

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