气候变化领域集成服务门户(CCPortal): Evolution of turbulent kinetic energy during the entire sandstorm process

CCPortal

DOI	10.5194/acp-22-8787-2022
	Evolution of turbulent kinetic energy during the entire sandstorm process
	Liu, Hongyou; Shi, Yanxiong; Zheng, Xiaojing
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	8787
结束页码	8803
卷号	22 期号:13 页码:17
英文摘要	An adaptive segmented stationary method for non-stationary signal is proposed to reveal the turbulent kinetic energy evolution during the entire sandstorm process observed at the Qingtu Lake Observation Array. Sandstorms, which are a common natural disaster, are mechanically characterized by a particle-laden two-phase flow experiencing wall turbulence, with an extremely high Reynolds number and significant turbulent kinetic energy. Turbulence energy transfer is important to the understanding of sandstorm dynamics This study indicates that large-scale and very large-scale coherent structures originally exist in the rising stage of sandstorms with a streamwise kinetic energy of 75 % (at z/delta = 0.2) rather than gradually forming. In addition to carrying a substantial portion of energy, the very large-scale motions are active structures with strong nonlinear energy transfer. These structures gain energy from strong nonlinear interaction. As a sandstorm evolves, these large structures are gradually broken by quadratic phase coupling, with the energy fraction reducing to 40 % (at z/delta = 0.2) in the declining stage. The nonlinear process in the steady and declining stages weakens and maintains a balanced budget of energy. The systematic bispectrum results provide a new perspective for further insight into sandstorms.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000821825700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273396
作者单位	Lanzhou University
推荐引用方式 GB/T 7714	Liu, Hongyou,Shi, Yanxiong,Zheng, Xiaojing. Evolution of turbulent kinetic energy during the entire sandstorm process[J],2022,22(13):17.
APA	Liu, Hongyou,Shi, Yanxiong,&Zheng, Xiaojing.(2022).Evolution of turbulent kinetic energy during the entire sandstorm process.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(13),17.
MLA	Liu, Hongyou,et al."Evolution of turbulent kinetic energy during the entire sandstorm process".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.13(2022):17.