Mixed Convection Heat Transfer of Shear-Thinning Fluids around Confined Square Cylinder at Low Reynolds Number

Abstract:

This work deals with the effect of thermal buoyancy on momentum and heat transfer characteristics of confined square cylinder submerged in Non Newtonian shear-thinning fluids. In two-dimension, the governing equations are solved by using the commercial code ANSYS-CFX. The effects of thermal buoyancy and power-law index, n, on the non-dimensional Drag coefficient and Nusselt number are studied for the conditions: Ri = 0 to 1, n = 0.3 to 0.9, Re = 40, Pr = 1 and blockage ratio β = 1/4. The detailed flow and temperature field are presented in terms of streamlines and isotherm contours. It is found that for all values of Richardson number increase in the power-law index increases the total drag coefficient and decreases the non-dimensional Nusselt number.

• Periodical: Defect and Diffusion Forum (Volume 384)
• Pages: 12-20
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.384.12
• Online since: May 2018
• Authors: Houssem Laidoudi*
• Keywords: Heat Transfer, Mixed Convection, Numerical Simulation, Nusselt Number, Square Cylinder

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