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首页> 外文期刊>Numerical Heat Transfer, Part A: Applications >Triggering Vortex Shedding by Superimposed Thermal Buoyancy Around Bluff Obstacles in Cross-Flow at Low Reynolds Numbers
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Triggering Vortex Shedding by Superimposed Thermal Buoyancy Around Bluff Obstacles in Cross-Flow at Low Reynolds Numbers

机译：低雷诺数下错流旁的障碍物周围的叠加热浮力触发涡流脱落

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摘要

Influences of superimposed thermal buoyancy on the initiation of vortex shedding process behind bluff obstacles (such as circular and square cylinders in 2-D) in cross-flow at low Reynolds numbers (10 ≤ Re ≤ 40) are discussed. The flow which is steady and separated at this Reynolds number range eventually becomes unsteady periodic with the introduction of thermal buoyancy. The aim here is to numerically predict the critical value of the buoyancy parameter (Richardson number, Ri) for the onset of vortex shedding. The critical Ri is found to have a decreasing tendency for both types of cylinder geometries with increasing Re.View full textDownload full textRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10407782.2012.672862
机译：叠加的热浮力在低雷诺数（10≥Re≥40）的错流中的钝壁障（例如2-D的圆形和方形圆柱体）的钝壁障后面涡流脱落过程的启动的影响进行了讨论。 。随着热浮力的引入，在该雷诺数范围内稳定且分离的流动最终变得不稳定。此处的目的是在数值上预测浮力脱落开始时的浮力参数的临界值（理查森数，Ri）。发现这两种类型的圆柱几何形状的关键Ri都随着Re的增加而减小。查看全文下载全文相关变量add add_id ，linkedin，facebook，stumbleupon，digg，google，更多”，发布号：“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/10407782.2012.672862

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