干旱区生态环境知识资源中心(Arid): Orientation of non spherical prolate dust particles moving vertically in the Earth's atmosphere

Arid

DOI	10.1016/j.jaerosci.2020.105657
	Orientation of non spherical prolate dust particles moving vertically in the Earth's atmosphere
	Mallios, Sotirios A.; Daskalopoulou, Vasiliki; Amiridis, Vassilis
通讯作者	Mallios, SA
来源期刊	JOURNAL OF AEROSOL SCIENCE
ISSN	0021-8502
EISSN	1879-1964
出版年	2021
卷号	151
英文摘要	Preferential particle orientation has been previously reported for desert dust and attributed on atmospheric electricity (Ulanowski et al., 2007). Depending on its strength, the total electric field within the dust layer can: (a) counteract the gravitational settling of large particles and (b) cause a preferential orientation of the non-spherical particles along the vertical direction (Fucks, 1958; Ulanowski et al., 2007). Both effects change the particle aerodynamics and impact radiative transfer. Here, we quantify the electrical and aerodynamic torques on the non-spherical prolate model that is frequently assumed for dust particles. The transport of these particles is assumed to only depend on the influence of electric and gravitational fields. We provide an analytical approximation for the calculation of the mean orientation angle of both charged and uncharged dust particles. We find that electric fields with strength greater than 60 kV/m are required for the alignment of particles up to 20 mu m in diameter, with the electric field lines. If the particles are moving with the same speed and in the same direction with the wind, the aerodynamic torque is zero and particle orientation along the electric field requires 1-2 orders of magnitude lower electric field strengths.
英文关键词	Atmospheric electricity Dust particle orientation Dust particle alignment
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000591602400004
WOS关键词	MINERAL DUST ; OPTICAL-PROPERTIES ; SIZE DISTRIBUTION ; COARSE-MODE ; AEROSOL ; MOTION ; DISTRIBUTIONS ; TRANSPORT ; BREAKDOWN ; CLOUDS
WOS类目	Engineering, Chemical ; Engineering, Mechanical ; Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328013
作者单位	[Mallios, Sotirios A.; Daskalopoulou, Vasiliki; Amiridis, Vassilis] Natl Observ Athens IAASARS, Athens, Greece; [Daskalopoulou, Vasiliki] Univ Crete, Fac Astrophys & Space Phys, Dept Phys, Iraklion, Greece
推荐引用方式 GB/T 7714	Mallios, Sotirios A.,Daskalopoulou, Vasiliki,Amiridis, Vassilis. Orientation of non spherical prolate dust particles moving vertically in the Earth's atmosphere[J],2021,151.
APA	Mallios, Sotirios A.,Daskalopoulou, Vasiliki,&Amiridis, Vassilis.(2021).Orientation of non spherical prolate dust particles moving vertically in the Earth's atmosphere.JOURNAL OF AEROSOL SCIENCE,151.
MLA	Mallios, Sotirios A.,et al."Orientation of non spherical prolate dust particles moving vertically in the Earth's atmosphere".JOURNAL OF AEROSOL SCIENCE 151(2021).