Measurement of fluid velocity development behind a circular cylinder using particle image velocimetry (PIV)

被引：14
|
作者：
Goharzadeh, Afshin [1 ]
Molki, Arman [1 ]
机构：
[1] Petr Inst, Dept Mech Engn, Abu Dhabi, U Arab Emirates
来源：
EUROPEAN JOURNAL OF PHYSICS | 2015年 / 36卷 / 01期
关键词：
PIV; flow visualization; velocity; cylinder; particle image velocimetry; LOW REYNOLDS NUMBERS; FLOW;
D O I：
10.1088/0143-0807/36/1/015001
中图分类号：
G40 [教育学];
学科分类号：
040101 ; 120403 ;
摘要：
In this paper we present a non-intrusive experimental approach for obtaining a two-dimensional velocity distribution around a 22 mm diameter circular cylinder mounted in a water tunnel. Measurements were performed for a constant Reynolds number of 7670 using a commercial standard particle image velocimetry (PIV) system. Different flow patterns generated behind the circular cylinder are discussed. Both instantaneous and time-averaged velocity distributions with corresponding streamlines are obtained. Key concepts in fluid mechanics, such as contra-rotating vortices, von Karman vortex street, and laminar-turbulent flow, are discussed. In addition, brief historical information pertaining to the development of flow measurement techniques-in particular, PIV-is described.
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页数：10
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