Heat and Mass Transfer in Porous Media
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Abstract
Abstract
This study investigated the effects of the diameter ( D p ) and height ( H p ) of pin fins on flow and heat transfer in three-layer porous laminates over a Reynolds number range of 3.4 × 10 3 to 6.0 × 10 3 . Steady-state and transient experiments were performed to measure the friction factor ( C f ), flow coefficient ( C d ), Nusselt number ( Nu ), and cooling efficiency ( η ). The results showed that reducing D p decreased flow resistance while improving heat transfer and cooling performance. Specifically, a D p of 0.90 mm enhanced Nu by 3.41%–7.00% and η by 1.70%–1.76%, and reduced C f by 1.70%–3.91% compared with D p = 1.20 mm. Among the tested configurations, Case D ( D p = 1.20 mm, H p = 0.30 mm) exhibited the best cooling performance, balancing high heat transfer efficiency with low flow resistance. These results indicated that smaller pin-fin diameters and moderate-to-small pin-fin heights are beneficial for achieving efficient cooling with limited pressure loss. A Nusselt–Reynolds-type correlation was developed to predict the dimensionless heat transfer performance with all deviations within ±5% at a 95% confidence level. The findings provide a basis for designing efficient, low-pressure-drop cooling systems for gas turbines and high-temperature applications.
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@article{Li2026Experimental,
title = {Experimental investigation of effect of pin-fin geometry on the cooling performance of three-layer porous laminates},
author = {Lang Li and Riu Liu and Shuai Zeng and Lang Li and YuJing Chang and Jing Luo and Chen Song and Hao He and RuiJie Gui},
journal = {Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering},
year = {2026},
doi = {10.1177/09544100261470963},
url = {https://doi.org/10.1177/09544100261470963}
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