Laminar non-Newtonian fluid flow in noncircular ducts and microchannels

被引：20

作者：

Muzychka, Y. S. ^{[1
]}

Edge, J. ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X5, Canada

来源：

JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME | 2008年 / 130卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

non-Newtonian flow; power law fluid; friction factor; noncircular ducts; laminar flow; microchannels;

D O I：

10.1115/1.2979005

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Non-Newtonian fluid flow in noncircular ducts and microchannels is examined. A simple model is proposed for power law fluids based on the Rabinowitsch-Mooney formulation. By means of a new characteristic length scale, the square root of the cross-sectional area, it is shown that dimensionless wall shear stress can be made a weak function of duct shape. The proposed model is based on the solution for the rectangular duct and has an accuracy of +/-10% or better. The current model eliminates the need for tabulated data or equations for several common shapes found in handbooks, namely, circular tube, elliptic tube, parallel channel, rectangular duct, isosceles triangular duct, circular annulus, and polygonal ducts.

引用

页码：1112011 / 1112017

页数：7