An Investigation on the Effects of Different Stratifications on Negatively Buoyant Jets
| Autor: | Maria Grazia Badas, Simone Ferrari, Giorgio Querzoli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Lighter fluid
Physics QC1-999 0208 environmental biotechnology Outfall Sea bottom 02 engineering and technology Mechanics 01 natural sciences Desalination 010305 fluids & plasmas 020801 environmental engineering Salinity symbols.namesake Brine 0103 physical sciences Froude number symbols Negative buoyancy |
| Zdroj: | EPJ Web of Conferences, Vol 180, p 02025 (2018) |
| Popis: | Negatively buoyant jets develop when fluids are released upwards into a lighter fluid or, vice versa, downwards into a heavier fluid. There are many engineering applications, such as the discharge, via submerged outfalls, of brine from desalination plants into the sea. Some concerns are raised about the potential negative environmental impacts of this discharge. The increase in salinity is the major cause for environmental impact, as it is very harmful to many marine species. The diffusers for brine discharge are typically inclined upwards, to increase the path before the brine reaches the sea bottom, as it tends to fall downwards driven by negative buoyancy. The negatively buoyant jet that develops conserves axisymmetry only when released vertically, so that it is not possible to use the well-known equations for axisymmetric jets. The main target of this paper is to investigate on a laboratory model the effects of different stratifications on the features of negatively buoyant jets. This has been done via a LIF (Light Induced Fluorescence) technique, testing various release angles on the horizontal and densimetric Froude numbers. Except for the initial stage, a different widening rate for the upper boundary and the lower boundary has been highlighted. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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