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Numerical study of self-sustained oscillatory flows and heat transfer in channels with a tandem of transverse vortex generators
被引：0
作者：
Alvaro Valencia
机构：
[1] Universidad de Chile Departamento de Ingeniería Mecánica Casilla 2777 Correo 21,
[2] Santiago,undefined
[3] Chile,undefined
来源：
Heat and Mass Transfer
|
1998年
/
33卷
关键词：
Vortex;
Heat Transfer;
Separation Distance;
Vortex Structure;
Oscillatory Behavior;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A numerical investigation was conducted into channel flows with a tandem of transverse vortex generators in the form of rectangular cylinders. The oscillatory behavior of the flow is studied. Data for heat transfer and flow losses are presented for 100≤Re≤400 and cylinder separation distances 1≤S/H≤4. The results are obtained by numerical solution of the full Navier-Stokes equations and the energy equation. Self-sustained flow oscillations are found for Re>100. Alternate and dynamic shedding of large vortex structures from the cylinders is observed by visualization of the numerically determined flow field. A heat transfer enhancement up to a factor 1.78 compared to plane channel flow is observed.
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页码：465 / 470
页数：5
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