dc.contributor.author |
Papakonstantis, IG |
en |
dc.contributor.author |
Christodoulou, GC |
en |
dc.date.accessioned |
2014-03-01T01:34:38Z |
|
dc.date.available |
2014-03-01T01:34:38Z |
|
dc.date.issued |
2010 |
en |
dc.identifier.issn |
1570-6443 |
en |
dc.identifier.uri |
https://dspace.lib.ntua.gr/xmlui/handle/123456789/20784 |
|
dc.subject |
Dense fluid discharges |
en |
dc.subject |
Density (gravity) currents |
en |
dc.subject |
Inclined negatively buoyant jets |
en |
dc.subject |
Jet-boundary interaction |
en |
dc.subject |
Radial spreading |
en |
dc.subject.other |
Buoyant jets |
en |
dc.subject.other |
Constant rate |
en |
dc.subject.other |
Dense fluid |
en |
dc.subject.other |
Densimetric Froude number |
en |
dc.subject.other |
Density (gravity) currents |
en |
dc.subject.other |
Density currents |
en |
dc.subject.other |
Discharge angle |
en |
dc.subject.other |
Drag forces |
en |
dc.subject.other |
Jet flow |
en |
dc.subject.other |
Jet fluid |
en |
dc.subject.other |
Jets impinging |
en |
dc.subject.other |
Radial distance |
en |
dc.subject.other |
Radial spreading |
en |
dc.subject.other |
Saltwater solution |
en |
dc.subject.other |
Submerged nozzles |
en |
dc.subject.other |
Drag |
en |
dc.subject.other |
Fluids |
en |
dc.subject.other |
Video cameras |
en |
dc.subject.other |
Buoyancy |
en |
dc.subject.other |
buoyancy |
en |
dc.subject.other |
density current |
en |
dc.subject.other |
discharge |
en |
dc.subject.other |
drag |
en |
dc.subject.other |
Froude number |
en |
dc.subject.other |
jet flow |
en |
dc.subject.other |
radial flow |
en |
dc.subject.other |
turbulent flow |
en |
dc.title |
Spreading of round dense jets impinging on a horizontal bottom |
en |
heal.type |
journalArticle |
en |
heal.identifier.primary |
10.1016/j.jher.2010.07.001 |
en |
heal.identifier.secondary |
http://dx.doi.org/10.1016/j.jher.2010.07.001 |
en |
heal.language |
English |
en |
heal.publicationDate |
2010 |
en |
heal.abstract |
The radial spreading of density currents arising from the impingement of submerged round turbulent dense jets on a horizontal bottom is investigated. Experiments were conducted for spreading due to (i) the return on the bottom of negatively buoyant jets discharged upwards at four different angles, namely 45 degrees, 60 degrees, 75 degrees and 85 degrees to the horizontal and (ii) the impingement of positively buoyant jets discharged horizontally or vertically downwards to the bottom from a submerged nozzle. The jet fluid was colored saltwater solution issuing at a constant rate in a calm freshwater ambient and the spreading was recorded by means of a video camera. For the inclined negatively buoyant jets and the vertical positively buoyant ones the outer visual boundary of the density current is found to be almost circular. The radial distance from the impingement point to the outer boundary is estimated and found to correlate with time to a power of about 1/2, indicating a balance between buoyancy and drag forces. The radial distance is normalized by time and by the initial or local jet flow parameters and its variation with the discharge angle and the densimetric Froude number is presented. (C) 2010 International Association of Hydro-environment Engineering and Research, Asia Pacific Division. Published by Elsevier B.V. All rights reserved. |
en |
heal.publisher |
ELSEVIER SCIENCE BV |
en |
heal.journalName |
Journal of Hydro-Environment Research |
en |
dc.identifier.doi |
10.1016/j.jher.2010.07.001 |
en |
dc.identifier.isi |
ISI:000286038800004 |
en |
dc.identifier.volume |
4 |
en |
dc.identifier.issue |
4 |
en |
dc.identifier.spage |
289 |
en |
dc.identifier.epage |
300 |
en |