Study on TPMS Air Heat Sink Structure Flow Heat Transfer Characteristics

A direct current chip heat sink with a Triply Periodic Minimal Surface (TPMS) structure as the core was constructed using Computational Fluid Dynamics (CFD) fluid-solid coupling numerical simulation. The temperature field, fluid velocity, and pressure field of five TPMS structures (Diamond, Gyroid, I-WP, Fischer-Koch, and F-RD) with the same conditions and a traditional fin structure with equivalent porosity were compared. A dimensionless local performance evaluation index was established to comprehensively compare the cooling effects of the six structures. The results indicated that TPMS structures exhibited a performance improvement of 16.6% to 50.6% compared to conventional fin structures. Among them, the Fischer-Koch structure demonstrated the most prominent heat dissipation capability, with greater cooling potential in constrained spaces. The internal flow heat transfer advantage of the Fischer-Koch structure was up to 12 times higher than that of the fin structure. © 2024 Science Press. All rights reserved.