悬浮流中柱状粒子取向分布函数的数值模拟

林建忠; 张凌新

悬浮流中柱状粒子取向分布函数的数值模拟

浙江大学, 力学系, 流体传动及控制国家重点实验室, 杭州, 310027

基金项目: 国家杰出青年科学基金资助项目(19925210)

详细信息

作者简介:
林建忠(1958- ),男,福建建阳人,教授,博士生导师;张凌新(1978- ),江苏通州人,博士生.

中图分类号: O359
计量
- 文章访问数: 1960
- HTML全文浏览量: 84
- PDF下载量: 727
- 被引次数: 0
出版历程
- 收稿日期: 2001-03-02
- 修回日期: 2002-03-26
- 刊出日期: 2002-08-15

Numerical Simulation of Orientation Distribution Function of Cylindrical Particle Suspensions

Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, P.C.China

摘要

摘要: 推导并数值模拟了悬浮流中柱状粒子取向的分布函数,并将其用于楔形流场计算,得到了取向分布函数与粒子方向角的关系。说明与短时间内形成的最可几角分布相比,稳定状态的分布变化幅度不大,主要变化在于右上区域的逆时针转动,速度梯度值大的地方,转动角度也越大;粒子最可几方向接近于流线方向:在流线方向上,随着极径减小,最可几角增大,同时它与流线夹角减小。
- 柱状粒子悬浮流 /
- 楔形流 /
- 取向分布函数 /
- 最可几角 /
- 数值模拟
Abstract: The orientation distribution function of cylindrical particle suspensions was deduced and numerically simulated,and an application was taken in a wedge-shaped flow field.The relationship between the orientation distribution function and particle orientation angles was obtained.The results show that comparing with the most probable angle distribution which comes to being in short time, the distribution of the steady state doesn.t vary much in range;the main difference is the anti-clockwise rotation in the right and upper field,that is,particles rotate more at the points where the velocity gradients are larger.The most probable orientations are close to the direction of local streamlines. In the direction of streamlines,with poleradius decreasing,the most probable angles increase,but the angles between their orientations and the local streamlines decrease.
- cylindrical particle suspension /
- wedge-shaped flow /
- orientation distribution function /
- most probable angle /
- numerical simulation

HTML全文

参考文献(6)

[1]	Givler R C, Crochet M J, Pipes R B. Numerical prediction for fiber orientation in dilute suspensions[J]. J Compos Mat,1983,17:330-343.
[2]	Givler R C. A numerical technique for the prediction of short fiber orientation resulting from the suspension flow[A]. In: Chen M M, Mazumdar J, Tucker C L Eds. Transport Phenomena in Material Processing[C]. New York: ASME,1983,99-103.
[3]	Folgar F P, Tucker C L. Orientation behavior of fibers in concentrated suspensions[J]. J Reinf Plast Compos,1984,3:98-119.
[4]	Jackson W C, Folgar F, Tucker C L. Prediction and control of fiber orientation in molded parts[A]. In: Han C D Ed. Polymer Blends and Composites in Multiphase Systems[C]. Washington: Adv Chem Ser,1984,279-181.
[5]	LIN Jian-zhong, ZHANG Ling-xin, WANG Ye-long. Research on the distribution function and orientation tensors of fiber suspensions in wedge-shaped flow field[J]. J Hydrodynamics,2002,14(1):23-29.
[6]	Jackson W C, Advani S G, Tucker C L. Prediction for the orientation of short fibers in thin compression molding[J]. J Compos Materials,1986,20:539-557.