Particle deposition due to point or line source diffusion

dc.contributor.author	Moghadam, Mahmoud
dc.contributor.department	Aerospace Engineering
dc.date	2018-08-17T04:26:51.000
dc.date.accessioned	2020-07-02T06:02:44Z
dc.date.available	2020-07-02T06:02:44Z
dc.date.copyright	Sun Jan 01 00:00:00 UTC 1984
dc.date.issued	1984
dc.description.abstract	<p>From considerations of dimensional analysis, the relationship among particulate mass flow rate, wind speed, air density, and gravitational acceleration is a mathematical function in which the mass flow rate is proportional to the wind speed cubed. On the other hand, experimental and field observations to date have been presented as relationships in which entrainment rate is proportional to the n('th) power of the wind speed (the empirical values of n have varied between 1 to 9). An experimental investigation has been conducted at Iowa State University in the open circuit wind tunnel of the Aerospace Engineering Department. The entrainment rates of lycopodium spores, diffused from line or point sources have been determined for various ranges of wind speed. A functional relationship is presented in which the source strength is proportional to the cube of the wind speed times an exponential function of friction to threshold speed ratio. The application of this relationship to the present, as well as other experimental and field data, shows good agreement with results. Further, ground concentration diagrams are obtained due to point or line source diffusion of lycopodium spores. The effects of two and three-dimensional obstructions on the redistribution of concentration have been studied. The experimental results in the absence of obstacles are compared to numerical predictions. Finally, the results are compared with the available experimental and field data.</p>
dc.format.mimetype	application/pdf
dc.identifier	archive/lib.dr.iastate.edu/rtd/7782/
dc.identifier.articleid	8781
dc.identifier.contextkey	6323733
dc.identifier.doi	https://doi.org/10.31274/rtd-180813-5903
dc.identifier.s3bucket	isulib-bepress-aws-west
dc.identifier.submissionpath	rtd/7782
dc.identifier.uri	https://dr.lib.iastate.edu/handle/20.500.12876/80697
dc.language.iso	en
dc.source.bitstream	archive/lib.dr.iastate.edu/rtd/7782/r_8423728.pdf\|\|\|Sat Jan 15 01:53:39 UTC 2022
dc.subject.disciplines	Aerospace Engineering
dc.subject.keywords	Aerospace engineering
dc.title	Particle deposition due to point or line source diffusion
dc.type	article
dc.type.genre	dissertation
dspace.entity.type	Publication
relation.isOrgUnitOfPublication	047b23ca-7bd7-4194-b084-c4181d33d95d
thesis.degree.level	dissertation
thesis.degree.name	Doctor of Philosophy

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