The presentwork analyses, for the first time, the heat transfer frompin micro-fins. The scope of the present paper is comparing thermal performance of plate micro-fin and pin micro-fin arrays under natural convection conditionsin air.Two fin geometries are considered: plate and pin fin arrayswith the same thermal exchanging surfaceare tested. The investigation shows that the pin micro-fins can improve the thermal performance compared toplate micro-fin arrays. Indeed, pin micro-fins are found to have higher heat transfer coefficients and lower thermalresistances, as well as a better material usage. This makes pin micro-fins able to achieve both thermal enhancementand weight reduction than plate micro-fins. The radiative heat transfer is also calculated: A new model to determine the radiative view factors of pin fins is proposed and is used in the analysis. The effect of the orientation is considered as well.
Micheli, L., Reddy, K. S., & Mallick, T. K. (2016). Experimental comparison of micro-scaled plate-fins and pin-fins under natural convection. International Communications in Heat and Mass Transfer, 75, 59–66. https://doi.org/10.1016/j.icheatmasstransfer.2016.03.023