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首页> 外文期刊>International Journal of Heat and Mass Transfer >Natural convection in rectangular tanks heated locally from below
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Natural convection in rectangular tanks heated locally from below

机译：从下方局部加热的矩形水箱中的自然对流

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摘要

The present study was undertaken in order to gain understanding of certain aspects of natural convection in a glass-melting tank heated locally from below. Based on numerical predictions, the effects of Rayleigh number, geometry of heated strip and tank on the flow patterns and heat transfer are investigated for Rayleigh numbers in the range 10~2 to 10~7, strip width to tank length ratios 0.1-0.5 and half-tank aspect ratios 1.0, 3.0 and 7.0. The effect of the heated strip position is studied by placing it at centre and off-centre positions at the tank bottom wall. The effect of Rayleigh number on heat transfer is found to be significant. The Nusselt number is obtained as a function of Rayleigh number, heated strip width to tank length ratio and tank aspect ratio. Augmentation of flow circulation intensity and fluid temperature results when increasing the tank length and strip width. A scale analysis led to a behaviour which is confirmed by the numerical results.
机译：进行本研究是为了了解从下方局部加热的玻璃熔池中自然对流的某些方面。基于数值预测，研究了瑞利数在10〜2到10〜7范围内，条宽与罐长之比为0.1-0.5的瑞利数，加热带钢和槽的几何形状对流型和传热的影响。半罐长宽比1.0、3.0和7.0。通过将加热后的钢带放置在罐底壁的中心位置和偏心位置来研究其影响。发现瑞利数对热传递的影响是显着的。 Nusselt数是瑞利数，加热的钢带宽度与罐长之比和罐长宽比的函数。当增加储罐长度和带钢宽度时，会增加流动循环强度和流体温度。规模分析导致了一种行为，该行为被数值结果所证实。

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