首页> 外文期刊>International Journal of Heat and Mass Transfer >Vortex shedding and heat transfer dependence on effective Reynolds number for mixed convection around a cylinder in cross flow
【24h】

Vortex shedding and heat transfer dependence on effective Reynolds number for mixed convection around a cylinder in cross flow

机译:横流中绕圆柱体的混合对流的涡旋脱落和传热取决于有效雷诺数

获取原文
获取原文并翻译 | 示例
       

摘要

The influence of surface heating of a circular cylinder on the wake structure and heat transfer in the range of Reynolds number (Re) for which parallel vortex shedding occurs, is investigated numerically for different values of the buoyancy parameter, Gr. The role of buoyancy induced barodinic vorticity on the wake formation is addressed in the present study. The variation of Strouhal number and Nusselt number with the 'effective Reynolds number', is analyzed for different values of cylinder to free stream temperature ratio. Both Strouhal number and the rate of heat transfer increases monotonically with the increase of the effective Reynolds number. The validity of the correlations, which have been established by several authors, between the effective Reynolds number and Strouhal/ Nusselt number for forced convection, is examined in the mixed convection regime. The curves between the effective Reynolds number and the computed data for Strouhal number and Nusselt number do not collapse for the range of temperature ratio considered here. The flow field is found to be asymmetric and the cylinder experiences a negative lift. The drag coefficient increases steadily with the rise of surface temperature.
机译:对于浮力参数Gr的不同数值,研究了圆柱表面的加热对尾流结构和传热的影响,在雷诺数(Re)范围内会发生平行涡旋脱落。本研究探讨了浮力诱发的二叠纪涡旋在尾流形成中的作用。对于汽缸与自由流温度比的不同值,分析了Strouhal数和Nusselt数随“有效雷诺数”的变化。斯特劳哈尔数和传热率均随有效雷诺数的增加而单调增加。在混合对流方式中,检验了由多位作者确定的有效对流有效雷诺数与Strouhal / Nusselt数之间相关性的有效性。对于此处考虑的温度比范围,有效雷诺数与Strouhal数和Nusselt数的计算数据之间的曲线不会崩溃。发现流场不对称,汽缸负升力。阻力系数随着表面温度的升高而稳定增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号