Behavior of near-field dilution of thermal buoyant jet discharged horizontally in compound open-channel

• Published in: Applied mathematics and mechanics 2008-02, Vol.29 (2), p.263-271
• Main Author: 槐文信 肖庆华 曾玉红 杨中华 钱忠东
• Format: Article
• Language: English
• Subjects: Applications of Mathematics; Buoyancy; Classical Mechanics; Computer simulation; Cross sections; Devices; Discharge; Fluid- and Aerodynamics; Mathematical analysis; Mathematical Modeling and Industrial Mathematics; Mathematical models; Mathematics; Mathematics and Statistics; Open channel flow; Partial Differential Equations; 分析方法; 化合物
• ISSN: 0253-4827; 1573-2754
• DOI: 10.1007/s10483-008-0214-z

The RNG κ-ε model considering the buoyancy effect, which is solved by the hybrid finite analytic method, is used to simulate the mixture of the horizontal round thermal buoyant jet in compound open channel flow. The mixing features near the spout and flowing characteristic of the secondary currents are studied by numerical simulation. Meanwhile, （1） the distribution of the measured isovels for stream-wise velocity, （2） secondary currents, （3） the distribution of the measured isovels for temperature of typical cross-section near the spout, were obtained by the three-dimensional Micro ADV and the temperature measuring device. Compared with experimental data, the RNG κ-ε model based on buoyancy effect can preferably simulate the jet which performs the bifurcation phenomenon, jet reattachment （Conada effect） and beach secondary currents phenomenon with the effect of ambient flow, buoyancy, and secondary currents of compound section and so on.