Dual role of thermal buoyancy in controlling boundary layer separation around bluff obstacles
作者: Dipankar Chatterjee
作者单位: 1Simulation & Modeling Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur 713209, India
刊名: International Communications in Heat and Mass Transfer, 2014, Vol.56 , pp.152-158
来源数据库: Elsevier Journal
DOI: 10.1016/j.icheatmasstransfer.2014.06.012
关键词: Thermal buoyancyCircular/square cylinderMixed convectionBoundary layer
原始语种摘要: Abstract(#br)We establish through numerical simulation a dual role played by the superimposed thermal buoyancy in controlling the boundary layer separation around bluff obstacles. The work essentially demonstrates the influence of superimposed thermal buoyancy on flow around bluff obstacles of circular and square cross sections in aiding/opposing and cross buoyancy configurations. For the aiding/opposing configuration we show two phenomena such as the suppression of flow separation which occurs at relatively low Reynolds numbers (10–40) and the suppression of vortex shedding at a moderate range of Reynolds numbers (50–150). In the cross buoyancy configuration, the initiation of vortex shedding by the introduction of thermal buoyancy is shown at relatively low Reynolds numbers (10–40)....
全文获取路径: Elsevier  (合作)
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