Universiti Teknologi Malaysia Institutional Repository

Experiments on the dynamics of density currents

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

[img]
Preview
PDF
514kB

Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

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%.

Item Type:Article
Uncontrolled Keywords:Bottom slope, Concentration
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:71677
Deposited By: Widya Wahid
Deposited On:16 Nov 2017 06:05
Last Modified:16 Nov 2017 06:05

Repository Staff Only: item control page