Buoyancy-Driven Flow Transitions in Deep Cavities Heated From Below

Chunmei Xia; Jayathi Y. Murthy

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Buoyancy-Driven Flow Transitions in Deep Cavities Heated From Below

机译：从下方加热的深腔中的浮力驱动的流变

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A numerical investigation has been conducted of flow transitions in deep three- dimensional cavities heated from below. The first critical Rayleigh number, Ra_I, below which the flow is at rest, and the second critical Rayeigh number, Ra_II, for transition from steady state to oscillatory flow, have been found for cavities of aspect ratios Ar in the range 1-5. Transition to chaos has also been examined for these cases. The results show that Ra_I = 3583, 2.545×10~4 and 5.5×10~5 and Ra_II=4.07×10~5, 1.65×10~6 and 1.30 ×10~7 for aspect ratios of 1, 2, and 5 respectively.

机译：对从下方加热的深三维空腔中的流动过渡进行了数值研究。对于纵横比Ar在1-5范围内的腔，已经找到了第一临界瑞利数Ra_I，低于该临界流量时，气流处于静止状态；第二临界瑞利数Ra_II，从稳态流变为振荡流。对于这些情况，也已经研究了向混乱的过渡。结果表明，对于纵横比分别为1，2和5的Ra_I = 3583，2.545×10〜4和5.5×10〜5，Ra_II = 4.07×10〜5，1.65×10〜6和1.30×10〜7 。

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来源
《Journal of Heat Transfer》 |2002年第4期|p.650-659|共10页
作者
Chunmei Xia; Jayathi Y. Murthy;
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作者单位

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类热力工程、热机;
关键词
Cavities; Enclosure Flows; Heat Transfer; Modeling;

机译：腔;机箱流量;传播热量;造型;

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Buoyancy-Driven Flow Transitions in Deep Cavities Heated From Below

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