A UNIFIED SIMILARITY TRANSFORMATION FOR DARCY AND NON-DARCY FORCED-CONVECTION, FREE-CONVECTION AND MIXED-CONVECTION HEAT-TRANSFER IN NON-NEWTONIAN INELASTIC FLUID-SATURATED POROUS-MEDIA

被引：23

作者：

NAKAYAMA, A

SHENOY, AV

机构：

[1] Department of Energy and Mechanical Engineering, Shizuoka University, Hamamatsu, 432

来源：

CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL | 1992年 / 50卷 / 01期

关键词：

D O I：

10.1016/0300-9467(92)80004-T

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A unified similarity transformation has been proposed which can deduce a class of possible similarity solutions during forced-, free- and mixed-convection flow of non-newtonian inelastic fluids through porous media under Darcy and non-Darcy conditions. The velocity scale using the slip velocity at the wall under mixed-convection flow has been utilized for generating a modified Peclet number which correctly transforms to the appropriate Peclet and Rayleigh numbers under limiting conditions. The unified approach is seen to reveal the existence of three limiting regimes lined by forced convection, Darcy free convection and Forchheimer free convection together with three intermediate regimes of Darcy mixed convection, Darcy-Forchheimer free convection and Forchheimer mixed convection. Exact solutions have been found for each of the regimes and the effects of non-newtonian character on the heat transfer characteristics have been deciphered.

引用

页码：33 / 45

页数：13

共 28 条

[1] MOMENTUM AND HEAT TRANSFER IN LAMINAR BOUNDARY-LAYER FLOWS OF NON-NEWTONIAN FLUIDS PAST EXTERNAL SURFACES [J].