立方腔盖驱动中稳态振荡转捩的实验观察
Experimental observation of the steady - oscillatory transition in a cubic lid-driven cavity
摘要：
粒子图像测速技术应用于立方体中的盖驱动流，以验证数值预测的定常振荡转变比以往观察到的雷诺数低。实验结果与数值模拟结果一致，表明在中平面内的基准二维流动上存在大振幅的振荡运动。在出现振荡的临界雷诺数和频率的值，以及类似的振荡振幅的空间分布得到了很好的协议。
英文摘要：
Particle image velocimetry is applied to the lid-driven flow in a cube to validate the numerical prediction of steady - oscillatory transition at lower than ever observed Reynolds number. Experimental results agree with the numerical simulation demonstrating large amplitude oscillatory motion overlaying the base quasi-two-dimensional flow in the mid-plane. A good agreement in the values of critical Reynolds number and frequency of the appearing oscillations, as well as similar spatial distributions of the oscillations amplitude are obtained.
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