| NUMERICAL FLOW VISUALIZATION OF A MIXING LAYER |
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| 引用本文： | Lin Jian-zhongDepartment of Mechanics,State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,Hangzhou 310027,P. R. ChinaYu Zhao-sheng,Shao Xue-mingDepartment of Mechanics,Zhejiang University,Hangzhou 310027.F. R. China. NUMERICAL FLOW VISUALIZATION OF A MIXING LAYER[J]. 水动力学研究与进展(B辑), 1998, 0(4) |
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| 作者姓名： | Lin Jian-zhongDepartment of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 P. R. ChinaYu Zhao-sheng Shao Xue-mingDepartment of Mechanics Zhejiang University Hangzhou 310027.F. R. China |
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| 作者单位： | Lin Jian-zhongDepartment of Mechanics，State Key Laboratory of Fluid Power Transmission and Control，Zhejiang University，Hangzhou 310027，P. R. ChinaYu Zhao-sheng，Shao Xue-mingDepartment of Mechanics，Zhejiang University，Hangzhou 310027.F. R. China |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China as well as ZhejlangProvince Natural Science Special Fund for Youth Seientists Cultivation． |
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| 摘 要： | The Kelvin-Helmhotz rollup of three-dimensional time-developing mixing layers is simulated numerically. Dye lines or fluid interfaces, often visualized in experiments, are presented by computing the passive scalar at high Peclet number. The scalar contours reveal the mushroom-shaped streaklines observed in many experiments [l]and uncover by far more exquisite structures beyond experimental observations. The hydric bubbles released at a constant time interval are also simulated numerically. To help understand the visualization results, we analyze the behavior of the coherent structures, such as the streamwise ribs and the spanwise rollers. A comparison between the vortical structure and the passive scalar contours indicates that the wrapping by the vortices largely dominates the evolution of the passive scalar.
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NUMERICAL FLOW VISUALIZATION OF A MIXING LAYER |
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| Lin Jian-zhong. NUMERICAL FLOW VISUALIZATION OF A MIXING LAYER[J]. Journal of Hydrodynamics, 1998, 0(4) |
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| Authors: | Lin Jian-zhong |
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| Affiliation: | Lin Jian-zhongDepartment of Mechanics,State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,Hangzhou 310027,P. R. ChinaYu Zhao-sheng,Shao Xue-mingDepartment of Mechanics,Zhejiang University,Hangzhou 310027.F. R. China |
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| Abstract: | The Kelvin-Helmhotz rollup of three-dimensional time-developing mixing layers is simulated numerically. Dye lines or fluid interfaces, often visualized in experiments, are presented by computing the passive scalar at high Peclet number. The scalar contours reveal the mushroom-shaped streaklines observed in many experiments [l]and uncover by far more exquisite structures beyond experimental observations. The hydric bubbles released at a constant time interval are also simulated numerically. To help understand the visualization results, we analyze the behavior of the coherent structures, such as the streamwise ribs and the spanwise rollers. A comparison between the vortical structure and the passive scalar contours indicates that the wrapping by the vortices largely dominates the evolution of the passive scalar. |
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| Keywords: | mixing layer coherent structures numerical flow visualization pseudo-spectral method |
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