Three-Dimensional Numerical Study of Multiple Vertical Buoyant Jets in Stationary Ambient Water
Publication: Journal of Hydraulic Engineering
Volume 146, Issue 7
Abstract
In this paper, the mixing and dilution characteristics of vertical buoyant jets discharged from multiport diffusers are studied numerically. The performances of four different turbulence closures are investigated, including the standard , renormalization group (RNG) , standard , and shear stress transport (SST) models, and the simulated results are compared to available experimental measurements. The comparisons demonstrate that a fully three-dimensional (3D) numerical model can be a reliable tool for the study of multiple vertical buoyant jets. Different fit measurement methods are employed to evaluate the turbulence models, and the results show that the predictions by the RNG model are the most accurate. The validated model is utilized to carry out additional computations with different port spacings and densimetric Froude numbers (), and the simulated centerline and transverse concentrations at various cross sections are extracted and analyzed. The study reveals how varying port spacing and affect multiple vertical buoyant jets. A new empirical formula that considers the port-spacing effect is proposed to describe the concentration decay along the jet centerline. The study also provides clues about merging points, well-mixed locations, and jet spread under the influences of port spacing.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request. (The experimental data, the numerical results, and the OpenFOAM files).
Acknowledgments
This work was funded by the Natural Sciences and Engineering Council of Canada (NSERC Discovery Grants). Xiaohui Yan was a recipient of a scholarship from the China Scholarship Council (CSC). We would like to thank the Editor in Chief, the anonymous Associate Editor, and the four reviewers for their careful reading of our manuscript and their insightful comments and suggestions.
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Published In
Journal of Hydraulic Engineering
Volume 146 • Issue 7 • July 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Nov 20, 2018
Accepted: Jan 13, 2020
Published online: Apr 30, 2020
Published in print: Jul 1, 2020
Discussion open until: Sep 30, 2020
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