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arXiv 1601.07032cond-mat.soft
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液膜厚度对湿颗粒恢复系数的影响

Influence of the liquid film thickness on the coefficient of restitution for wet particles

Thomas Müller, Kai Huang

摘要:

对球形颗粒在湿平面上弹跳的法向恢复系数进行了实验研究,并与冲击能量损失模型进行了比较。对于液膜厚度$δ$与颗粒直径$D$的固定比率,湿COR总是发现随着St $^{-1}$线性衰减,其中St,斯托克斯数,测量相对于液体的粘性力的颗粒惯性。这种依赖性表明了一种用两个拟合参数预测湿COR的方便方法:无限大St时的临界COR和零COR时的临界St。我们表征的依赖性的两个参数上$δ/D$和比较它与考虑能量损失的惯性和粘度的润湿液体的模型。这项调查表明,湿颗粒的COR的分析预测。

英文摘要:

The normal coefficient of restitution (COR) for a spherical particle bouncing on a wet plane is investigated experimentally and compared with a model characterizing the energy loss at impact. For fixed ratios of liquid film thickness $δ$ to particle diameter $D$, the wet COR is always found to decay linearly with St$^{-1}$, where St, the Stokes number, measures the particle inertia with respect to the viscous force of the liquid. Such a dependency suggests a convenient way of predicting the wet COR with two fit parameters: A critical COR at infinitely large St and a critical St at zero COR. We characterize the dependency of the two parameters on $δ/D$ and compare it with a model considering the energy loss from the inertia and the viscosity of the wetting liquid. This investigation suggests an analytical prediction of the COR for wet particles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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