Large eddy simulations of 45° inclined dense jets
Submerged inclined dense jets (negatively buoyant jets) occur in many engineering applications such as brine discharges from seawater desalination plants and de-cooling water discharges from liquefied natural gas plants, and their mixing behavior needs to be examined in details for the environmental...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/93726 http://hdl.handle.net/10220/38370 |
| _version_ | 1826117845638971392 |
|---|---|
| author | Jiang, Baoxin Law, Adrian Wing-Keung Zhao, Bing Zhang, Shuai |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Jiang, Baoxin Law, Adrian Wing-Keung Zhao, Bing Zhang, Shuai |
| author_sort | Jiang, Baoxin |
| collection | NTU |
| description | Submerged inclined dense jets (negatively buoyant jets) occur in many engineering applications such as brine discharges from seawater desalination plants and de-cooling water discharges from liquefied natural gas plants, and their mixing behavior needs to be examined in details for the environmental impact analysis. In the present study, a detailed numerical investigation was performed using the large eddy simulation (LES) approach with both the Smagorinsky and Dynamic Smagorinsky sub-grid scale (SGS) models to simulate the characteristics of the inclined dense jet with 45° inclination. The numerical predictions included the jet trajectory, geometrical characteristics, jet spread and eddy structures. Experimental measurements were also obtained for the validation of the LES predictions, and data from existing studies in the literature were included for comparison. Overall, the LES predictions were able to reproduce the geometric characteristics of the inclined dense jet in a satisfactory manner in most aspects. The dilution was however generally underestimated, which was attributed primarily to the inability of the SGS models to reproduce the convective mixing induced by the buoyancy-induced instability using the adopted grid spacing in the bottom half of the inclined dense jet. |
| first_indexed | 2024-10-01T04:34:01Z |
| format | Journal Article |
| id | ntu-10356/93726 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:34:01Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/937262020-09-26T21:59:27Z Large eddy simulations of 45° inclined dense jets Jiang, Baoxin Law, Adrian Wing-Keung Zhao, Bing Zhang, Shuai School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute DRNTU::Engineering::Civil engineering::Water resources Submerged inclined dense jets (negatively buoyant jets) occur in many engineering applications such as brine discharges from seawater desalination plants and de-cooling water discharges from liquefied natural gas plants, and their mixing behavior needs to be examined in details for the environmental impact analysis. In the present study, a detailed numerical investigation was performed using the large eddy simulation (LES) approach with both the Smagorinsky and Dynamic Smagorinsky sub-grid scale (SGS) models to simulate the characteristics of the inclined dense jet with 45° inclination. The numerical predictions included the jet trajectory, geometrical characteristics, jet spread and eddy structures. Experimental measurements were also obtained for the validation of the LES predictions, and data from existing studies in the literature were included for comparison. Overall, the LES predictions were able to reproduce the geometric characteristics of the inclined dense jet in a satisfactory manner in most aspects. The dilution was however generally underestimated, which was attributed primarily to the inability of the SGS models to reproduce the convective mixing induced by the buoyancy-induced instability using the adopted grid spacing in the bottom half of the inclined dense jet. Accepted version 2015-07-23T07:48:44Z 2019-12-06T18:44:22Z 2015-07-23T07:48:44Z 2019-12-06T18:44:22Z 2015 2015 Journal Article Zhang, S., Jiang, B., Law, A.-K., & Zhao, B. (2015). Large eddy simulations of 45° inclined dense jets. Environmental Fluid Mechanics, 1-21 1567-7419 https://hdl.handle.net/10356/93726 http://hdl.handle.net/10220/38370 10.1007/s10652-015-9415-2 en Environmental fluid mechanics © 2015 Springer Science+Business Media Dordrecht. This is the author created version of a work that has been peer reviewed and accepted for publication by [Environmental Fluid Mechanics], [Springer Science+Business Media Dordrecht]. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [doi:http://dx.doi.org/10.1007/s10652-015-9415-2]. 35 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Water resources Jiang, Baoxin Law, Adrian Wing-Keung Zhao, Bing Zhang, Shuai Large eddy simulations of 45° inclined dense jets |
| title | Large eddy simulations of 45° inclined dense jets |
| title_full | Large eddy simulations of 45° inclined dense jets |
| title_fullStr | Large eddy simulations of 45° inclined dense jets |
| title_full_unstemmed | Large eddy simulations of 45° inclined dense jets |
| title_short | Large eddy simulations of 45° inclined dense jets |
| title_sort | large eddy simulations of 45° inclined dense jets |
| topic | DRNTU::Engineering::Civil engineering::Water resources |
| url | https://hdl.handle.net/10356/93726 http://hdl.handle.net/10220/38370 |
| work_keys_str_mv | AT jiangbaoxin largeeddysimulationsof45inclineddensejets AT lawadrianwingkeung largeeddysimulationsof45inclineddensejets AT zhaobing largeeddysimulationsof45inclineddensejets AT zhangshuai largeeddysimulationsof45inclineddensejets |