A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical Simulations of 15-Degree Inclined Dense Jets in Stagnate Water Over a Sloped Bottom
Improper discharge of brine will cause significant harm to the water environment and organisms near desalination plants or sewage discharge outfalls systems. Inclined dense jets are commonly used in discharge systems to enhance the mixing efficiency and minimize environmental impacts. Many studies focus on the inclined dense jet on a horizontal bottom, and they have provided plenty of valuable information on geometrical and mixing characteristics of inclined dense jet, which is important for outfall designs. Since the brine is usually denser than receiving water, it will eventually move along the seabed. This leads us to carry out this study about how mixing develops for the inclined dense jet on the bottom especially on a sloped one since the seabed always has the natural inclination. In the present study, the mixing of inclined dense jet on the sloped bottom is investigated by numerical simulations using the solver twoLiquidMixingFoam in OpenFOAM. A Reynolds Averaged Navier Strokes (RANS) turbulence models (Nonlinear k-ε) was chosen to perform the jet behavior analysis. Jets of inclination angle of 15° with four different initial conditions (Froude number = 10,15, 20, 25) on three different bed slope angles (0°, 3°and 6°) in stagnant water were studied. The results show that (1) the coefficients of the jet geometric characteristics have good agreement with previous studies; (2) After the impact point, the slope did enhance the dilution of the plume compared to the horizontal bed; (3) The dilution was thus affected by the slope and the dilution after the impact point on the slope appeared to be linearly related to the distance to the source;(4) The slope can approximately enhance the dilution up to 10% compared with the horizontal bed after the impact point. The present study can provide practical information for the design of desalination and industrial plants, especially for reducing the influence of the brine plume on the seabed and can lead research to focus on the bottom boundary condition at outfall systems.
Numerical Simulations of 15-Degree Inclined Dense Jets in Stagnate Water Over a Sloped Bottom
Improper discharge of brine will cause significant harm to the water environment and organisms near desalination plants or sewage discharge outfalls systems. Inclined dense jets are commonly used in discharge systems to enhance the mixing efficiency and minimize environmental impacts. Many studies focus on the inclined dense jet on a horizontal bottom, and they have provided plenty of valuable information on geometrical and mixing characteristics of inclined dense jet, which is important for outfall designs. Since the brine is usually denser than receiving water, it will eventually move along the seabed. This leads us to carry out this study about how mixing develops for the inclined dense jet on the bottom especially on a sloped one since the seabed always has the natural inclination. In the present study, the mixing of inclined dense jet on the sloped bottom is investigated by numerical simulations using the solver twoLiquidMixingFoam in OpenFOAM. A Reynolds Averaged Navier Strokes (RANS) turbulence models (Nonlinear k-ε) was chosen to perform the jet behavior analysis. Jets of inclination angle of 15° with four different initial conditions (Froude number = 10,15, 20, 25) on three different bed slope angles (0°, 3°and 6°) in stagnant water were studied. The results show that (1) the coefficients of the jet geometric characteristics have good agreement with previous studies; (2) After the impact point, the slope did enhance the dilution of the plume compared to the horizontal bed; (3) The dilution was thus affected by the slope and the dilution after the impact point on the slope appeared to be linearly related to the distance to the source;(4) The slope can approximately enhance the dilution up to 10% compared with the horizontal bed after the impact point. The present study can provide practical information for the design of desalination and industrial plants, especially for reducing the influence of the brine plume on the seabed and can lead research to focus on the bottom boundary condition at outfall systems.
Numerical Simulations of 15-Degree Inclined Dense Jets in Stagnate Water Over a Sloped Bottom
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / el Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / Wang, Xinyun (author) / Mohammadian, Abdolmajid (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 7 ; 63-74
2022-05-18
12 pages
Article/Chapter (Book)
Electronic Resource
English
| Wiley | 2005
British Library Online Contents | 2012
| British Library Online Contents | 1997
| Online Contents | 1997