详细信息
文献类型:期刊文献
中文题名:幂律非牛顿流体流动的有限体积算法
英文题名:A Finite Volume Method for Calculating Flows of Power-Law Non-Newton Fluids
作者:袁世伟[1];赖焕新[1]
机构:[1]华东理工大学承压系统与安全教育部重点实验室,上海200237
年份:2013
卷号:39
期号:3
起止页码:364
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;Scopus;北大核心:【北大核心2011】;CSCD:【CSCD2013_2014】;
基金:国家自然科学基金项目(51176048)
语种:中文
中文关键词:幂律流体;有限体积法;圆管;突扩圆管;流动指数
外文关键词:power-law fluids; FVM; pipe; sudden expansion; power law index
摘要:以幂律非牛顿流体为研究对象,针对其表观黏度随剪切速率变化且计算过程有别于牛顿流体的特殊困难,提出了一种高精度格式的有限体积计算方法。对其中应力计算时可能出现的"零障碍"和"无限大障碍"奇点问题,采用限定表观黏度数值变化范围的方法以防止迭代计算过程中出现除零和除无穷问题,并给出了完整的计算方法。计算了幂律流体在圆管和突扩圆管中的层流流动,验证了该计算方法的有效性。并分析了幂律流体的流动指数对圆管和突扩圆管中层流流动的影响。
A high resolution finite volume method(FVM) for calculating power-law non-Newton fluid is presented in this paper. In order to avoid the singularities of viscosity at zero- and infinite shear rates, where the apparent viscosity calculated by the power-law will impose difficulty for simulation of the flows, a strategy of limiting the range of apparent viscosity is proposed. The finite volume method is tested by calculating two laminar flows of power law fluids, in a pipe and in a sudden expansion, respectively. The influence of power-law index on the velocity distribution is also analyzed.
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