文献类型：期刊文献

英文题名：R/S method for unevenly sampled time series: Application to detecting long-term temporal dependence of droplets transiting through a fixed spatial point in gas-liquid two-phase turbulent jets

作者：Ji, Li-Jun[1,2];Zhou, Wei-Xing[1,3,4,5];Liu, Hai-Feng[1,4,6];Gong, Xin[1,4,6];Wang, Fu-Chen[1,4,6];Yu, Zun-Hong[1,4,6]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Coll Chem Engn, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Sch Business, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, Res Ctr Syst Engn, Shanghai 200237, Peoples R China;[5]E China Univ Sci & Technol, Sch Sci, Shanghai 200237, Peoples R China;[6]E China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China

年份：2009

卷号：388

期号：17

起止页码：3345

外文期刊名：PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS

收录：;EI(收录号：20092512138431);WOS:【SCI-EXPANDED(收录号:WOS:000267963200008)】；

基金：This work was partially supported by the National Basic Research Program of China (No. 2004CB217703), the PCSIRT (IRT0620), the Program for New Century Excellent Talents in University (NCET-05-0413 and NCET-07-0288), and the Project Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

语种：英文

外文关键词：Drop; Fluid mechanics; Fractals; Multiphase flow; Rescaled range analysis; Dual Particle Dynamical Analyzer

摘要：We perform rescaled range analysis upon the signals measured by a Dual Particle Dynamical Analyzer in gas-liquid two-phase turbulent jets. A novel rescaled range analysis is proposed to investigate these unevenly sampled signals. The Hurst exponents of velocity and other passive scalars in the bulk of spray are obtained to be 0.59 +/- 0.02 and the fractal dimension is hence 1.41 +/- 0.02, which is in remarkable agreement with and much more precise than previous results. These scaling exponents are found to be independent of the configuration and dimensions of the nozzle and the fluid flows. Therefore, Such type of systems form a universality class with invariant scaling properties. (C) 2009 Elsevier B.V. All rights reserved.