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Numerical Modeling of 3D Flow Field among a Compound Stilling Basin
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-06-12
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
Due to great velocity gradients among the outgoing flow, it is much common to form large-scale reverse flow with oblique movements outside the conventional separated stilling basin.
Aimed at above problems, this paper proposes to remove the longitudinal splitter wall and then physically and numerically investigate the corresponding influence upon the compound stilling basin.
The standard k-ε, renormalization group k-ε, realizable k-ε, and large eddy simulation turbulence models are all employed to reveal downstream three-dimensional flow field.
Experimental validation of numerical results shows that the renormalization group k-ε turbulence model is the most successful in predicting the flow field among the four models.
Both methods prove that the removed splitter wall exerts great impact upon downstream stilling basin.
In view of the removed splitter wall, discharging inflow would greatly diffuse to form a typical three-dimensional (3D) hydraulic jump with large-scale reverse flow.
High energy dissipation region and high turbulent kinetic energy region are both moved upstream.
Thus, the velocity decay among the discharging flow in the compound stilling basin is significantly enhanced.
Compared to the separated stilling basin, the maximum velocity and average velocity of the outgoing flow, respectively, decrease more than 30%, and 20% in the compound stilling basin.
Additionally, the velocity gradients between the left and the right outgoing flow reduce by over 65% with turbulent kinetic energy gradients almost down to zero.
The outgoing flow from the compound stilling basin becomes much uniform with the phenomenon of obliquely moving flow totally eliminated.
American Psychological Association (APA)
Zhou, Zhao& Wang, Junxing. 2019. Numerical Modeling of 3D Flow Field among a Compound Stilling Basin. Mathematical Problems in Engineering،Vol. 2019, no. 2019, pp.1-17.
https://search.emarefa.net/detail/BIM-1196280
Modern Language Association (MLA)
Zhou, Zhao& Wang, Junxing. Numerical Modeling of 3D Flow Field among a Compound Stilling Basin. Mathematical Problems in Engineering No. 2019 (2019), pp.1-17.
https://search.emarefa.net/detail/BIM-1196280
American Medical Association (AMA)
Zhou, Zhao& Wang, Junxing. Numerical Modeling of 3D Flow Field among a Compound Stilling Basin. Mathematical Problems in Engineering. 2019. Vol. 2019, no. 2019, pp.1-17.
https://search.emarefa.net/detail/BIM-1196280
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196280