A comparative experimental thermal performance analysis of conical pin fin heat sink with staggered and modified staggered layout under forced convection

• Published in: Thermal science and engineering progress Vol. 37; p. 101560
• Main Authors: Abuşka, Mesut, Çorumlu, Vahit
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2023
• Subjects: Conical pin fin; Experimental thermal performance; Forced convection; Heat sink; Modified staggered; Conical pin fin; Forced convection; Experimental thermal performance; Modified staggered; Heat sink
• ISSN: 2451-9049; 2451-9049
• DOI: 10.1016/j.tsep.2022.101560

•An experimental thermal performance study of conical pin fin heat sinks in comparison.•CPFHSmst has the minimum Rth and Tj in all tests.•CCPFHSperp has the maximum pressure drop in any case.•CCPFHSperp at 33 W and CPFHSmst at 66–99 W has the highest average Nu.•CPFHSmst has a better average THP than other heat sink models for all the powers. In contrast to the common practice of evaluating heat sinks with inline or standard staggered fin placement, this research investigated the thermo-hydraulic performance of conical pin–fin heat sinks with staggered-(CPFHSst) and modified staggered-(CPFHSmst) fin placements. The heat sinks with cross-cut pin-fins oriented parallel-(CCPFHSpar) and perpendicular-(CCPFHSperp) to the airflow and a flat heat sink (FHS) are also used for comparison. The effect of heat sink fin placement on the parameters became remarkable with increasing Re, so the modified staggered fin placement was 2–7 °C lower than the staggered surface and junction temperatures. Rth of the modified model compared to the staggered was 5.3 %, 5.8 %, and 3.5 % lower, while the highest ΔP is in CCPFHSperp with 6.7, 6.9, and 7.4 Pa. CCPFHSperp provided a 29.9 % advantage of Nu to the modified model, whereas the modified model provided a 6.4 % over CCPFHSperp and a 17.4 % over the staggered model for the test powers. The modified model provides the highest THP performance, with a 13.3 % advantage over CCPFHSperp, 12 %, and 10.9 % over the staggered model for the test powers. The CPFHSmst is superior regarding thermo-hydraulic performance and is an appropriate option among many heat sink models in the literature.