Numerical Simulation of Vertical Buoyant Wall Jet Discharged into a Linearly Stratified Environment

AbstractResults are presented from a numerical simulation to investigate the vertical buoyant wall jet discharged into a linearly stratified environment. A tracer transport model considering density variation was implemented. The standard k-ϵ model with the buoyancy effect was used to simulate the e...

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Bibliographic Details
Published in:Journal of hydraulic engineering (New York, N.Y.) N.Y.), 2018-07, Vol.144 (7)
Main Authors: Zhang, Zhiyong, Guo, Yakun, Zeng, Jian, Zheng, Jinhai, Wu, Xiuguang
Format: Article
Language:English
Subjects:
Buoyancy
Computer simulation
Deceleration
Density
Discharge
Length
Mathematical models
Momentum
Simulation
Technical Note
Technical Notes
Tracers
Velocity
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Summary:AbstractResults are presented from a numerical simulation to investigate the vertical buoyant wall jet discharged into a linearly stratified environment. A tracer transport model considering density variation was implemented. The standard k-ϵ model with the buoyancy effect was used to simulate the evolution of the buoyant jet in a stratified environment. Results show that the maximum jet velocity trend along the vertical direction has two regions: acceleration and deceleration. In the deceleration region, jet velocity is reduced by the mixing taking place between jet fluid and ambient lighter fluid. Jet velocity is further decelerated by the upward buoyant force when ambient fluid density is greater than jet fluid density. The normalized peak value of the cross-sectional maximum jet velocity decreases with λ (the ratio between the characteristic momentum length and the buoyancy length). When λ
ISSN:0733-9429
1943-7900
DOI:10.1061/(ASCE)HY.1943-7900.0001473