Abstract
Numerical investigation of heat transfer phenomena of low Reynolds number nano-fluid flow over an isothermal cylinder is presented in this paper. Steady state governing equations (continuity, N–S and energy equations) have been solved using finite volume method. Stationary heat transfer, and flow characteristics over the cylinder have been studied for water based copper nanofluid with different solid fraction values. The effect of volume fraction of nano- particles on the fluid flow and heat transfer were investigated numerically. It was found that at a given Nusselt number, drag coefficient, re-circulation length, and pressure coefficient increase by increasing the volume fraction of nano-particles.
Highlights
Convective heat transfer can be enhanced by using various methods and techniques, such as increasing the effective heat transfer surface or the heat transfer coefficient
The governing equations with the relevant boundary conditions mentioned in previous subsection, were solved by the finite volume method and discretized by QUICK (Quadratic Upwind Interpolation for Convective Kinematics) scheme in space
Effect of nano-particle on augmentation in heat transfer we investigated the effect of nano-particle volume fraction on heat transfer performance of nanofluid
Summary
Convective heat transfer can be enhanced by using various methods and techniques, such as increasing the effective heat transfer surface or the heat transfer coefficient. Sarkar et al [6] investigated numerically mixed convective heat transfer for non-Newtonian nano-fluids around a square cylinder in a vertical flow configuration They presented the effects of Re, Ri and φ numbers (where m and n are values of shear-thinning power-law nanofluids) on heat transfer. Another numerical study on fluid flow and heat transfer around a solid circular cylinder utilizing nanofluid was done by Valipour and ZareGhadi [10] Their results showed that as the solid volume fraction increases, the magnitude of minimum velocity in the wake region and recirculation length increase while separation angle decreases. [11] investigated a numerical simulation to study the fluid flow and heat transfer around a square cylinder utilizing Al2O3-H2O nanofluid for low Reynolds numbers.
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