NUMERICAL SIMULATIONS OF RESONANT HEAT TRANSFER AUGMENTATION AT LOW REYNOLDS NUMBERS

机译：低雷诺数下的共振传热强化的数值模拟

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The effect of flow rate modulation on low Reynolds number heat transfer enhancement in a transversely grooved passage was numerically simulated using a two-dimensional spectral element technique. Simulations were performed at subcritical Reynolds numbers of Re_m = 133 and 267, with 20% and 40% flow rate oscillations. The net pumping power required to modulate the flow was minimized as the forcing frequency approached the predicted natural frequency. However, mixing and heat transfer levels both increased as the natural frequency was approached. Oscillatory forcing in a grooved passage requires two orders of magnitude less pumping power than flat passage systems for the same heat transfer level. Hydrodynamic resonance appears to be an effective method of increasing heat transfer in low Reynolds number systems where pumping power is at a premium, such as micro heat transfer applications.

机译：使用二维光谱元素技术，数值模拟了流量调节对横向沟槽中低雷诺数传热增强的影响。在Re_m = 133和267的亚临界雷诺数下进行了模拟，流速波动为20％和40％。当强迫频率接近预测的固有频率时，调节流量所需的净泵浦功率被最小化。然而，随着接近自然频率，混合和传热水平均增加。对于相同的传热水平，在带槽通道中的振荡强迫所需的泵送功率比平通道系统少两个数量级。在泵送功率非常高的低雷诺数系统中，例如微传热应用，水动力共振似乎是增加传热的有效方法。

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《The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York》|2001年|p.3-11|共9页
会议地点 New York NY(US);New York NY(US)
作者
Miles Greiner; Paul F. Fischer; Henry Tufo;
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Mechanical Engineering Department University of Nevada, Reno;

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正文语种 eng
中图分类电工技术;
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NUMERICAL SIMULATIONS OF RESONANT HEAT TRANSFER AUGMENTATION AT LOW REYNOLDS NUMBERS

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