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Experiments on the dynamics of density currents

Density currents occur when fluid of one density propagates along a horizontal boundary into fluid of a different density. In dam reservoirs, density currents are the main transport mechanism for the incoming sediments and they play an important role in redistribution of existing sediments. This pap...

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Main Authors:	Nasrollahpour, R., Jamal, M. H., Ismail, Z., Rusli, N. M.
Format:	Article
Language:	English
Published:	Penerbit UTM Press 2016
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/71677/1/RezaNasrollahpour2016_ExperimentsontheDynamics%20ofDensityCurrents.pdf http://eprints.utm.my/id/eprint/71677/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991702137&doi=10.11113%2fjt.v78.9697&partnerID=40&md5=06a736704169112719eed443072c754f
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id	my.utm.71677
record_format	eprints
spelling	my.utm.716772017-11-16T06:05:39Z http://eprints.utm.my/id/eprint/71677/ Experiments on the dynamics of density currents Nasrollahpour, R. Jamal, M. H. Ismail, Z. Rusli, N. M. TA Engineering (General). Civil engineering (General) Density currents occur when fluid of one density propagates along a horizontal boundary into fluid of a different density. In dam reservoirs, density currents are the main transport mechanism for the incoming sediments and they play an important role in redistribution of existing sediments. This paper aims to investigate velocity structure in the body of density currents. To this end, laboratory experiments were performed on density currents having various initial conditions and bottom slopes. Then, vertical velocity profiles were recorded in the body of density currents. The velocity structure of the currents was investigated by fitting equations to the wall and jet regions of the measured profiles, and the constants of the equations were yielded with R2 more than 0.80. Temporal and spatial evolution of density currents were also analysed to study the dynamics of the frontal region of the currents. It was observed that the currents having more bottom slope travel at a further distance. It was also found that 400% increase in the initial concentration of the currents can increase their frontal velocity up to 97%. Penerbit UTM Press 2016 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/71677/1/RezaNasrollahpour2016_ExperimentsontheDynamics%20ofDensityCurrents.pdf Nasrollahpour, R. and Jamal, M. H. and Ismail, Z. and Rusli, N. M. (2016) Experiments on the dynamics of density currents. Jurnal Teknologi, 78 (9-4). pp. 71-76. ISSN 0127-9696 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991702137&doi=10.11113%2fjt.v78.9697&partnerID=40&md5=06a736704169112719eed443072c754f
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Nasrollahpour, R. Jamal, M. H. Ismail, Z. Rusli, N. M. Experiments on the dynamics of density currents
description	Density currents occur when fluid of one density propagates along a horizontal boundary into fluid of a different density. In dam reservoirs, density currents are the main transport mechanism for the incoming sediments and they play an important role in redistribution of existing sediments. This paper aims to investigate velocity structure in the body of density currents. To this end, laboratory experiments were performed on density currents having various initial conditions and bottom slopes. Then, vertical velocity profiles were recorded in the body of density currents. The velocity structure of the currents was investigated by fitting equations to the wall and jet regions of the measured profiles, and the constants of the equations were yielded with R2 more than 0.80. Temporal and spatial evolution of density currents were also analysed to study the dynamics of the frontal region of the currents. It was observed that the currents having more bottom slope travel at a further distance. It was also found that 400% increase in the initial concentration of the currents can increase their frontal velocity up to 97%.
format	Article
author	Nasrollahpour, R. Jamal, M. H. Ismail, Z. Rusli, N. M.
author_facet	Nasrollahpour, R. Jamal, M. H. Ismail, Z. Rusli, N. M.
author_sort	Nasrollahpour, R.
title	Experiments on the dynamics of density currents
title_short	Experiments on the dynamics of density currents
title_full	Experiments on the dynamics of density currents
title_fullStr	Experiments on the dynamics of density currents
title_full_unstemmed	Experiments on the dynamics of density currents
title_sort	experiments on the dynamics of density currents
publisher	Penerbit UTM Press
publishDate	2016
url	http://eprints.utm.my/id/eprint/71677/1/RezaNasrollahpour2016_ExperimentsontheDynamics%20ofDensityCurrents.pdf http://eprints.utm.my/id/eprint/71677/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991702137&doi=10.11113%2fjt.v78.9697&partnerID=40&md5=06a736704169112719eed443072c754f
_version_	1643656249832636416
score	13.211869

Experiments on the dynamics of density currents

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