| 圆球颗粒间有幂律流体时挤压流动的法向粘性力 |
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| 引用本文： | 徐泳,黄文彬,李红艳.圆球颗粒间有幂律流体时挤压流动的法向粘性力[J].农业工程学报,2002,18(2):1-4. |
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| 作者姓名： | 徐泳 黄文彬 李红艳 |
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| 作者单位： | 中国农业大学工程基础科学部 |
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| 基金项目： | 国家自然科学基金资助项目(批准号19972075) |
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| 摘 要： | 为了建立湿颗粒系统的离散元模型,研究了两刚性圆球颗粒间的幂律流体在挤压流动时产生的法向粘性力,并导出了任意球颗粒间的压力分布和法向粘性力的积分表达式,并可证明此粘性力表达式可以退回到牛顿流体情形。与Rodin的渐近解的数值比较表明,该结果在全范围内是光滑连续的合理解,而Rodin的渐近解只是在幂指数大于1/3后才与粘性力积分表达式的解逐渐重合
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| 关 键 词： | 离散元法 幂律流体 挤压流动 粘性力 |
| 文章编号： | 1002-6819(2002)02-0001-04 |
| 收稿时间： | 2001/10/9 0:00:00 |
| 修稿时间： | 2001年10月9日 |
Viscous Force of Squeeze Flow Between Two Spherical Particles With Power-Law Fluid |
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| Xu Yong,Huang Wenbin and Li Hongyan.Viscous Force of Squeeze Flow Between Two Spherical Particles With Power-Law Fluid[J].Transactions of the Chinese Society of Agricultural Engineering,2002,18(2):1-4. |
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| Authors: | Xu Yong Huang Wenbin and Li Hongyan |
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| Abstract: | The normal viscous force between two arbitrary rigid spheres with an interstitial power law fluid was studied in order to establish model for wet granular materials using the Discrete Element Method. As a result, analytical integration form expressions of pressure distribution and the viscous force for two arbitrary spheres were obtained, which behaves smooth, continuous and could be reduced to the Newtonian case. Numerical comparison on the viscous force with Rodin's asymptotic solution shows a general coincidence with each other when the power index exceeds 1/3. |
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| Keywords: | discrete element method power law fluid squeeze flow viscous force |
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