垂直加热槽内自然对流的绝对不稳定性和对流不稳定性

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Pub Date : 2000-12-01 DOI:10.1103/physreve.62.7957

Tao, Zhuang

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引用次数: 6

摘要

对垂直加热槽内自然对流流动的时空不稳定性进行了理论研究。二次单元和行波两种不稳定模式分别为绝对不稳定和对流不稳定。利用模型模拟槽中心的温度梯度，提出了控制流型反转的机制，并从行波模态的角度解释了反转后观测到的温度波动。

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Absolute and convective instabilities of the natural convection in a vertical heated slot

The spatiotemporal instability of a natural convection flow in vertical heated slot is studied theoretically. The two unstable modes, secondary cell and traveling wave, are illustrated to be absolute and convective instabilities, respectively. Using a model to simulate the temperature gradient in the center of the slot, we propose an interpretation of the mechanism controlling the reverse transition of flow patterns, and explain the temperature fluctuation observed after the reverse transition in terms of the traveling wave mode.

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Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

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