Open AccessViscosity and dispersion effects on natural convection from a vertical cone in a nonnewtonian fluid saturated porous medium
Author(s) -
Rishi Raj Kairi
Publication year - 2011
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci110614124k
Subject(s) - natural convection , lewis number , buoyancy , porous medium , thermodynamics , materials science , viscosity , mechanics , power law fluid , non newtonian fluid , heat transfer , mass transfer , dispersion (optics) , porosity , physics , optics , composite material
This paper investigates the influence of double dispersion and viscosity on natural convection heat and mass transfer from vertical cone in a non-Darcy porous medium saturated with non- Newtonian fluid. The surface of the cone and the ambient medium are maintained at constant but different levels of temperature and concentration. The Ostwald-de Waele power law model is used to characterize the non-Newtonian fluid behavior. A similarity solution for the transformed governing equations is obtained. The numerical computation is carried out for various values of the non-dimensional physical parameters. The effect of non-Darcy parameter, viscosity parameter, thermal and solutal dispersion, buoyancy ratio, Lewis number and power-law index parameter on the temperature and concentration field as well as on the heat and mass transfer coefficients is analyzed.