The dynamic mechanism of a moving Crookes radiometer

doi:10.1063/1.4765353

CORC > 北京大学 > 工学院

	The dynamic mechanism of a moving Crookes radiometer
	Chen, Songze ; Xu, Kun ; Lee, Cunbiao
刊名	physics of fluids
	2012
关键词	angular velocity blades fans flow instability flow simulation kinetic theory Knudsen flow numerical analysis radiometers rotational flow torque GAS-KINETIC SCHEME RAREFIED FLOWS KNUDSEN FORCES CONTINUUM MICROCANTILEVERS
DOI	10.1063/1.4765353
英文摘要	The dynamics of a 2D rotating Crookes radiometer is studied using a moving mesh unified gas kinetic scheme. The whole evolution process of a fan from an initial unsteady start-up to a final steady state rotational movement in a rarefied gas environment is simulated numerically. Through the numerical study, the unsteady force distribution along a vane which dynamically drives the fan movement is captured. And a quantitative connection between total torque and rotational speed of the fan in the Knudsen number regime of 10(-3) < Kn < 10(2) is obtained. Based on the dimensional analysis, the total radiometric torque can be decomposed into a net radiometric driving torque and a rotational resistance. Based on the numerical data, the analytical functions of the torque and angular velocity of a rotating fan in terms of Knudsen number are quantitatively constructed. This relationship is used to explain the experimental observation of the Knudsen number shift for the appearance of the maximum torque and the maximum rotational speed in the transitional flow regime. (C) 2012 American Institute of Physics. [http://dx.doi.orgt10.1063/1.4765353]; Mechanics; Physics, Fluids & Plasmas; SCI(E); EI; 6; ARTICLE; 11; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/315937]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Songze,Xu, Kun,Lee, Cunbiao. The dynamic mechanism of a moving Crookes radiometer[J]. physics of fluids,2012.
APA	Chen, Songze,Xu, Kun,&Lee, Cunbiao.(2012).The dynamic mechanism of a moving Crookes radiometer.physics of fluids.
MLA	Chen, Songze,et al."The dynamic mechanism of a moving Crookes radiometer".physics of fluids (2012).