Studying the performance of solid/perforated pin-fin heat sinks using entropy generation minimization

Abstract Heat transfer and pressure drop characteristics of a set of pin-fins with uniform heat flux were investigated experimentally and numerically. Test set-up was designed to assess the effects of mass flow rate, fin height, and fin density on convection heat transfer and pressure drop. In the numerical investigation, the flow field of various design parameters of the heat sink was simulated. It was found that heat sinks having fin heights of 20 and 30 mm operated at a lower Reynolds number reached minimum value for thermal resistance when the fin density 10 × 10. Which means it is the optimum number of fins for this case. Also, friction factor increased with a decrease in the bypass flow area or inter-fin distance spacing and using perforated fins reduced the pressure losses and thermal resistance for all studied cases.

[1]  K. Al-Jamal,et al.  Experimental investigation in heat transfer of triangular and pin fin arrays , 1998 .

[2]  Suvash C. Saha,et al.  Numerical study of turbulent fluid flow and heat transfer in lateral perforated extended surfaces , 2014 .

[3]  Giovanni Tanda,et al.  Heat transfer and pressure drop in a rectangular channel with diamond-shaped elements , 2001 .

[4]  Ephraim M Sparrow,et al.  Heat transfer and pressure drop for a staggered wall-attached array of cylinders with tip clearance , 1978 .

[5]  F. Durst,et al.  Performance comparison of pin fin in-duct flow arrays with various pin cross-sections , 2006 .

[6]  Mohammad Ali,et al.  Numerical Investigation of Turbulent Heat Convection from Solid and Longitudinally Perforated Rectangular Fins , 2013 .

[7]  Experiments and modeling of the hydraulic resistance and heat transfer of in-line square pin fin heat sinks with top by-pass flow , 2005 .

[8]  Miao Qian,et al.  Effect of tip clearance on the heat transfer and pressure drop performance in the micro-reactor with micro-pin–fin arrays at low Reynolds number , 2014 .

[9]  Eric Beyne,et al.  Design of an optimal heat-sink geometry for forced convection air cooling of Multi-Chip Modules , 1994 .

[10]  W. Nakayama,et al.  Optimization of Finned Heat Sinks for Impingement Cooling of Electronic Packages , 1998 .

[11]  Ryosuke Matsumoto,et al.  Effect of Pin Fin Arrangement on Endwall Heat Transfer , 1996 .

[12]  J. P. Bronson,et al.  Developing Heat Transfer in Rectangular Ducts With Staggered Arrays of Short Pin Fins , 1982 .

[13]  J. Armstrong,et al.  A Review of Staggered Array Pin Fin Heat Transfer for Turbine Cooling Applications , 1987 .

[14]  Mahmood Yaghoubi,et al.  Thermal enhancement from heat sinks by using perforated fins , 2009 .

[15]  Minking K. Chyu,et al.  Convective Heat Transfer of Cubic Fin Arrays in a Narrow Channel , 1998 .

[16]  J. Whitelaw,et al.  Convective heat and mass transfer , 1966 .

[17]  H. Warnecke,et al.  Convective heat transfer and pressure loss in rectangular ducts with drop-shaped pin fins , 1997 .

[18]  J. W. Ramsey,et al.  Experiments on In-line Pin Fin Arrays and Performance Comparisons with Staggered Arrays , 1980 .

[19]  Mehmet Yilmaz,et al.  Second law analysis of rectangular channels with square pin-fins , 2001 .

[20]  G. J. Vanfossen,et al.  Effect of Location in an Array on Heat Transfer to a Short Cylinder in Crossflow , 1984 .