Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mixing of Saline Gravity Current Jet into Ambient Freshwater in Weakly Turbulent Regime
This paper investigates mixing of a saline water jet into ambient freshwater at rest in a large basin. Reynolds-averaged Navier–Stokes (RANS) and diffusion-convection equations of the saline water volume fraction are used to model the mixing and the propagation of the saline gravity current jet. The comparison of the numerical and experimental front positions shows good agreement for Reynolds and Richardson numbers varying in the ranges and , respectively. The numerical simulations of the hydrodynamic fields show that the velocity maximum is located at 0.18 , where is the height at which the mean velocity is equal to half the maximum velocity . The local gradient Richardson number shows that maximum turbulent mixing occurs at in the first stage of the gravity current close to the inlet, whereas far from the inlet, the turbulent mixing collapses. The entrainment depends both on the front position and on the values of the isodensity threshold, whereas it is independent of bulk Reynolds and Froude numbers in the narrow ranges (; ).
Mixing of Saline Gravity Current Jet into Ambient Freshwater in Weakly Turbulent Regime
This paper investigates mixing of a saline water jet into ambient freshwater at rest in a large basin. Reynolds-averaged Navier–Stokes (RANS) and diffusion-convection equations of the saline water volume fraction are used to model the mixing and the propagation of the saline gravity current jet. The comparison of the numerical and experimental front positions shows good agreement for Reynolds and Richardson numbers varying in the ranges and , respectively. The numerical simulations of the hydrodynamic fields show that the velocity maximum is located at 0.18 , where is the height at which the mean velocity is equal to half the maximum velocity . The local gradient Richardson number shows that maximum turbulent mixing occurs at in the first stage of the gravity current close to the inlet, whereas far from the inlet, the turbulent mixing collapses. The entrainment depends both on the front position and on the values of the isodensity threshold, whereas it is independent of bulk Reynolds and Froude numbers in the narrow ranges (; ).
Mixing of Saline Gravity Current Jet into Ambient Freshwater in Weakly Turbulent Regime
Ahmed, Dhafar Ibrahim (Autor:in) / Latrache, Noureddine (Autor:in) / Nsom, Blaise (Autor:in)
13.03.2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Gravity-Current Fronts Advancing into Horizontal Ambient Flow
| Online Contents | 1993
Gravity-Current Fronts Advancing into Horizontal Ambient Flow
| British Library Online Contents | 1993
Turbulence Measurements in Saline Gravity Current Fronts
| British Library Conference Proceedings | 1996
Open Bottomed Freshwater Containment Ponds in Saline Waters
| British Library Conference Proceedings | 1999
Mixing of turbulent wall-jet into free-stream
| Engineering Index Backfile | 1962