THERMAL SCIENCE

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Rishi Raj Kairi

VISCOSITY AND DISPERSION EFFECTS ON NATURAL CONVECTION FROM A VERTICAL CONE IN A NONNEWTONIAN FLUID SATURATED POROUS MEDIUM

ABSTRACT
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.
KEYWORDS
non-Newtonian, natural convection, thermal dispersion, solutal dispersion, variable viscosity
PAPER SUBMITTED: 2011-06-14
PAPER REVISED: 2011-09-23
PAPER ACCEPTED: 2011-10-08
DOI REFERENCE: https://doi.org/10.2298/TSCI110614124K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2011, VOLUME 15, ISSUE Supplement 2, PAGES [S307 - S316]
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Viscosity and dispersion effects on natural convection from a vertical cone in a nonnewtonian fluid saturated porous medium

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