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首页> 外文期刊>International Journal of Heat and Mass Transfer >Natural convection around a horizontal heated cylinder: The effects of vertical confinement
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Natural convection around a horizontal heated cylinder: The effects of vertical confinement

机译：水平加热圆筒周围的自然对流：垂直限制的影响

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摘要

The effect of vertical confinement on the natural convection flow and heat transfer around a horizontal heated cylinder is investigated. The flow characteristics and the time-resolved heat transfer have been measured respectively above and around the cylinder. It is shown that the primary effect of the vertical confinement is an increase in heat flux on the upper part of the cylinder for given separation distances between the cylinder and the fluid boundary. This increase is shown to be related to the large-scale oscillation of the thermal plume. The relationship between the flow pattern and the heat transfer characteristics at the cylinder surface is studied and the origin of the oscillation discussed.
机译：研究了垂直约束对水平加热圆柱体周围自然对流和传热的影响。分别在气缸的上方和周围测量了流动特性和时间分辨的热传递。结果表明，垂直限制的主要作用是在给定的圆柱体与流体边界之间的分隔距离下，圆柱体上部的热通量增加。该增加表明与热羽流的大规模振荡有关。研究了汽缸表面的流型与传热特性之间的关系，并讨论了振荡的起源。

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