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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >Velocity and wall-shear-stress measurements of internal vortex flows in a two-sided lid-driven cavity
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Velocity and wall-shear-stress measurements of internal vortex flows in a two-sided lid-driven cavity

机译:两侧盖驱动腔中内部涡流的速度和壁切应力测量

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The Newtonian fluid flour in a two-sided lid-driven cavity is investigated experimentally. The motion is driven by two independently rotating cylinders forming two facing walls of the cavity. At low Reynolds numbers the flow is two-dimensional, apart from end-wall effects. It becomes three-dimensional via a pitchfork bifurcation at a first critical Reynolds number, and a steady cellular structure appears. At a second critical Reynolds number this three-dimensional flow becomes time-dependent through a Hopf bifurcation. Both transitions are investigated by laser-Doppler velocimetry (LDV) and hot-film anemometry (HFA). [References: 2]
机译:实验研究了双面盖驱动型腔中的牛顿流体粉。该运动由形成腔体的两个相对壁的两个独立旋转的圆柱体驱动。在低雷诺数下,流动是二维的,除了端壁效应。它通过干草叉分叉以第一个临界雷诺数变为三维,并出现稳定的细胞结构。在第二个关键的雷诺数下,该三维流通过霍夫夫分叉变得与时间有关。通过激光多普勒测速仪(LDV)和热膜风速仪(HFA)研究了这两种转变。 [参考:2]

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