Velocity-field measurements in a dam-break flow using a PTV Vorono⟨ imaging technique

被引：63
|
作者：
Aleixo, R. [1 ]
Soares-Frazao, S. [2 ]
Zech, Y. [1 ]
机构：
[1] Catholic Univ Louvain, Inst Mech Mat & Civil Engn, Dept Civil & Environm Engn, B-1348 Louvain, Belgium
[2] Catholic Univ Louvain, FNRS, Fonds Rech Sci, Dept Civil & Environm Engn, B-1348 Louvain, Belgium
来源：
EXPERIMENTS IN FLUIDS | 2011年 / 50卷 / 06期
关键词：
TRACKING TECHNIQUE; CHANNEL; WATER; PIV;
D O I：
10.1007/s00348-010-1021-y
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A dam-break flow is an example of an extremely transient free-surface flow with various time and space scales. The importance of studying this type of flow is directly connected with the risk assessment of a dam and with the effects of such a catastrophe on human activities in the valley downstream. In this paper, an experimental study of the dam-break flow is presented. While a great part existing studies about dam-break flows are focused on variables such as the water-front velocity and the water level, the present paper is focused on the measurement of velocity profiles over the whole flow depth within the dam-break wave. For such study and due to the characteristics of the flow itself, image acquisition techniques were used. The velocity field was obtained by means of a Particle Tracking Velocimetry (PTV) algorithm based on Vorono < patterns' matching. A comparison with the application of a PIV algorithm to the raw data is provided. Finally, results for the velocity profiles and water elevation are presented and discussed for two different flow conditions.
引用
收藏
页码：1633 / 1649
页数：17
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