干旱区生态环境知识资源中心(Arid): Modeling of Spherical Dust Particle Charging due to Ion Attachment

Arid

DOI	10.3389/feart.2021.709890
	Modeling of Spherical Dust Particle Charging due to Ion Attachment
	Mallios, Sotirios A.; Papangelis, Georgios; Hloupis, George; Papaioannou, Athanasios; Daskalopoulou, Vasiliki; Amiridis, Vassilis
通讯作者	Mallios, SA (corresponding author), Natl Observ Athens IAASARS, Athens, Greece.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2021
卷号	9
英文摘要	The attachment of positive and negative ions to settling spherical dust particles is studied. A novel 1D numerical model has been developed to parameterize the charging process in the presence of a large-scale electric field. The model is able to self-consistently calculate the modification of atmospheric ion densities in the presence of the dust particles, and the consequent alteration of the atmospheric electrical conductivity and the large-scale electric field. Moreover, the model estimates the acquired electrical charge on the dust particles and calculates the electrical force that is applied on them. Using observed dust size distributions, we find that the particles can acquire electrical charge in the range of 1-1,000 elementary charges depending on their size and number density. The particles become mainly negatively charged, but under specific conditions giant mode particles (larger than 50 mu m radius) can be positive. Moreover, the large-scale electric field can increase up to 20 times as much as the fair weather value. However, our approach shows that the resultant electrical force is not enough to significantly influence their gravitational settling, as the ratio between the electrical force magnitude and the gravity magnitude does not exceed the value of 0.01. This indicates that the process of ion attachment alone is not sufficient to create strong electrical effects for the modification of particle dynamics. Therefore, other processes, such as the triboelectric effect and updrafts, must be included in the model to fully represent the impact of electricity on particle dynamics.
英文关键词	dust particle electrification dust particle charging ion attachment dust particle settling dust particle transport atmospheric electricity
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000685124000006
WOS关键词	SAHARAN DUST ; OPTICAL-PROPERTIES ; ELECTRICAL-PROPERTIES ; DESERT DUST ; AEROSOL-PARTICLES ; COARSE-MODE ; SIZE ; TRANSPORT ; FIELD ; DISTRIBUTIONS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363288
作者单位	[Mallios, Sotirios A.; Papangelis, Georgios; Papaioannou, Athanasios; Daskalopoulou, Vasiliki; Amiridis, Vassilis] Natl Observ Athens IAASARS, Athens, Greece; [Hloupis, George] Univ West Attica, Fac Engn, Dept Surveying & GeoInformat Engn, 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.,Papangelis, Georgios,Hloupis, George,et al. Modeling of Spherical Dust Particle Charging due to Ion Attachment[J],2021,9.
APA	Mallios, Sotirios A.,Papangelis, Georgios,Hloupis, George,Papaioannou, Athanasios,Daskalopoulou, Vasiliki,&Amiridis, Vassilis.(2021).Modeling of Spherical Dust Particle Charging due to Ion Attachment.FRONTIERS IN EARTH SCIENCE,9.
MLA	Mallios, Sotirios A.,et al."Modeling of Spherical Dust Particle Charging due to Ion Attachment".FRONTIERS IN EARTH SCIENCE 9(2021).