Evolution of mixing width induced by general Rayleigh-Taylor instability | |
Zhang YS; He ZW; Gao FJ; Li XL(李新亮); Tian BL; Tian, BL (reprint author), Inst Appl Phys & Computat Math, Key Lab Computat Phys, Beijing 100094, Peoples R China. | |
发表期刊 | PHYSICAL REVIEW E |
2016 | |
卷号 | 93期号:6页码:63102 |
ISSN | 2470-0045 |
摘要 | Turbulent mixing induced by Rayleigh-Taylor (RT) instability occurs ubiquitously in many natural phenomena and engineering applications. As the simplest and primary descriptor of the mixing process, the evolution of mixing width of the mixing zone plays a notable role in the flows. The flows generally involve complex varying acceleration histories and widely varying density ratios, two dominant factors affecting the evolution of mixing width. However, no satisfactory theory for predicting the evolution has yet been established. Here a theory determining the evolution of mixing width in general RT flows is established to reproduce, first, all of the documented experiments conducted for diverse (i.e., constant, impulsive, oscillating, decreasing, increasing, and complex) acceleration histories and all density ratios. The theory is established in terms of the conservation principle, with special consideration given to the asymmetry of the volume-averaged density fields occurring in actual flows. The results reveal the sensitivity or insensitivity of the evolution of a mixing front of a neighboring light or heavy fluid to the degree of asymmetry and thus explain the distinct evolutions in two experiments with the same configurations. |
关键词 | Robotic Fish Capability Optimization The Taguchi Method |
DOI | 10.1103/PhysRevE.93.063102 |
URL | 查看原文 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000377334300010 |
关键词[WOS] | Robotic Fish ; Capability Optimization ; The Taguchi Method |
WOS研究方向 | Physics |
WOS类目 | Physics, Fluids & Plasmas ; Physics, Mathematical |
项目资助者 | We acknowledge financial support from the Chinese Academy of Engineering Physics (CAEP) under Grant No. YZ2015015 and LCP9140C690104150C69303 and from the National Nature Science Foundation of China (NSFC) under Grants Nos. 11502029, 11572052, 11472059, 11171037, 11372330, 11472278, and 91441103. |
课题组名称 | LHD可压缩湍流 |
论文分区 | 一类 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/59566 |
专题 | 高温气体动力学国家重点实验室 |
通讯作者 | Tian, BL (reprint author), Inst Appl Phys & Computat Math, Key Lab Computat Phys, Beijing 100094, Peoples R China. |
推荐引用方式 GB/T 7714 | Zhang YS,He ZW,Gao FJ,et al. Evolution of mixing width induced by general Rayleigh-Taylor instability[J]. PHYSICAL REVIEW E,2016,93,6,:63102. |
APA | Zhang YS,He ZW,Gao FJ,李新亮,Tian BL,&Tian, BL .(2016).Evolution of mixing width induced by general Rayleigh-Taylor instability.PHYSICAL REVIEW E,93(6),63102. |
MLA | Zhang YS,et al."Evolution of mixing width induced by general Rayleigh-Taylor instability".PHYSICAL REVIEW E 93.6(2016):63102. |
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