NUMERICAL STUDY ON THE STABILITY AND MIXING OF VERTICAL ROUND BUOYANT JET IN SHALLOW WATER

The k-epsilon model was applied to establish the mathematical model of vertical round buoyant jet discharging into confined depth, and it was solved using the Hybrid Finite Analytic Method (HFAM). The numerical predictions demonstrate two generic flow patterns for different jet discharge and environ...

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Published in:Applied mathematics and mechanics 2005, Vol.26 (1), p.92-100
Main Author: 曾玉红 槐文信
Format: Article
Language:English
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圆形浮力射流
数字仿真
混合有限分析法
混合特征
稳定性
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description The k-epsilon model was applied to establish the mathematical model of vertical round buoyant jet discharging into confined depth, and it was solved using the Hybrid Finite Analytic Method (HFAM). The numerical predictions demonstrate two generic flow patterns for different jet discharge and environmental parameters:(Ⅰ) a stable buoyant flow discharge with the mixed fluid leaving the near-field warm in a surface warm water layer;(Ⅱ) an unstable buoyant flow discharge with recirculation and re-entrainment of warm water in the near field. Furthermore, the mixing characters of vertical round buoyant jet were numerically predicted. Both the stability criterion and numerical predictions of bulk dilutions are in excellent agreement with Lee and Jirka ' s experiments and theory.
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subjects 圆形浮力射流
数字仿真
混合有限分析法
混合特征
稳定性
title NUMERICAL STUDY ON THE STABILITY AND MIXING OF VERTICAL ROUND BUOYANT JET IN SHALLOW WATER
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