非线性边界滑移挤压膜流动

周平; 吴承伟; 马国军

非线性边界滑移挤压膜流动

工业装备和结构分析国家重点实验室;大连理工大学工程力学系,大连 116024

基金项目: 国家自然科学基金资助项目(10332010,10272028,10421002);高等学校博士点专项基金资助项目(2003141013)

详细信息

作者简介:
周平(1980- ),男,浙江人,博士(E-mail:joep1205@yahoo.com.cn);吴承伟(1957- ),男,教授,博士(联系人.E-mail:cwwu@dlut.edu.cn).

中图分类号: O357.1
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- 被引次数: 0
出版历程
- 收稿日期: 2005-06-25
- 修回日期: 2006-06-02
- 刊出日期: 2006-09-15

Squeeze Film Flow With Nonlinear Boundary Slip

State Key Laboratory of Structural Analysis for Industrial Equipment, Deptartment of Engineering Mechanics, Dalian University of Technology, Dalian 116024, P. R. China

摘要

摘要: 用一种包含初始滑移长度和临界剪切率的非线性边界滑移模型研究了两个球体间的挤压流体膜问题．研究发现初始滑移长度对低剪切率下的滑移行为起主要作用，而临界剪切率决定了高剪切率下的边界滑移程度．球体表面挤压流体膜的边界滑移量是与半径坐标相关的高度非线性函数．在挤压膜的中心点和远离中心点处由于低剪切率滑移量等于初始滑移长度，然而在高剪切率区域滑移长度迅速增加．球体挤压膜的流体动压力随着初始滑移长度的增加和临界剪切率的减小而减小，并且临界剪切率对流体动力的影响要比初始滑移长度大的多，当临界剪切率很小的情况下，流体动压随着最小膜厚的减小几乎不再增加．所用模型给出的理论预报和实验非常吻合．
- 边界滑移 /
- 非线性 /
- 挤压膜 /
- 流体流动
Abstract: A nonlinear boundary slip model consisting of an initial slip length and a critical shear rate was used to study the nonlinear boundary slip of squeeze fluid film confined between two approaching spheres. It is found that the initial slip length controls the slip behavior at small shear rate, but the critical shear rate controls the boundary slip at high shear rate. The boundary slip at the squeeze fluid film of spherical surfaces is a strongly nonlinear function of the radius coordinate. At the center or far from the center of the squeeze film, the slip length equals the initial slip length due to the small shear rate. However, in the high shear rate regime the slip length increases very much. The hydrodynamic force of the spherical squeeze film decreases with increasing the initial slip length and decreasing the critical shear rate. The effect of initial slip length on the hydrodynamic force seems less than that of the critical shear rate. When the critical shear rate is very small the hydrodynamic force increases very slowly with a decrease in the minimum film thickness. The theoretical predictions agree well with the experiment measurements.
- boundary slip /
- nonlinear /
- squeeze film /
- fluid flow

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参考文献(22)

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文章访问数: 2137
HTML全文浏览量: 111
PDF下载量: 624
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非线性边界滑移挤压膜流动

作者简介:
周平(1980- ),男,浙江人,博士(E-mail:joep1205@yahoo.com.cn);吴承伟(1957- ),男,教授,博士(联系人.E-mail:cwwu@dlut.edu.cn).

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Squeeze Film Flow With Nonlinear Boundary Slip

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留言板

非线性边界滑移挤压膜流动

作者简介: 周平(1980- ),男,浙江人,博士(E-mail:joep1205@yahoo.com.cn);吴承伟(1957- ),男,教授,博士(联系人.E-mail:cwwu@dlut.edu.cn).

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出版历程

Squeeze Film Flow With Nonlinear Boundary Slip

计量

出版历程

目录

作者简介:
周平(1980- ),男,浙江人,博士(E-mail:joep1205@yahoo.com.cn);吴承伟(1957- ),男,教授,博士(联系人.E-mail:cwwu@dlut.edu.cn).