槽道流中矩形障碍物的平衡位形
Equilibrium configuration of a rectangular obstacle immersed in a channel flow
摘要:
流体围绕障碍物流动产生涡流,涡流又在障碍物上产生升力。因此,即使在完全对称的框架中,均衡位置也可能是不对称的。我们表明,这是不是在一个无界的2D通道的Poiffille流的情况下,至少对于小雷诺数和流量。我们考虑的情况下,垂直移动的障碍物和障碍物绕一个固定的销旋转。
英文摘要:
Fluid flows around an obstacle generate vortices which, in turn, generate lift forces on the obstacle. Therefore, even in a perfectly symmetric framework equilibrium positions may be asymmetric. We show that this is not the case for a Poiseuille flow in an unbounded 2D channel, at least for small Reynolds number and flow rate. We consider both the cases of vertically moving obstacles and obstacles rotating around a fixed pin.
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