管流中稀悬浮液的管夹效应机理
Mechanism of Tubular Pinch Effect of Dilute Suspension in a Pipe Flow
摘要：
实验表明，稀悬浮液在层流状态下通过圆管时，颗粒向平均半径约为圆管半径0.6倍的同心环形区域迁移。这种现象被称为管箍缩效应，这仍然没有完全理解。在这项研究中，能量梯度方法被用来研究这一现象。发现在低雷诺数时，颗粒将向r/R=0.58的位置移动。根据实验结果，对这一现象的机理进行了解释。
英文摘要：
Experiments have shown that in dilute suspension flow at laminar state through a circular tube particles migrate towards a concentric annular region with a mean radius of about 0.6 of the tube radius. This phenomenon is well-known as the tubular pinch effect, which is still not fully understood. In this study, the energy gradient method is used to study this phenomenon. It is found that at low Reynolds number particles will move to the position of r/R=0.58. Based on the result, the mechanism of this phenomenon is well explained.
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