Study on Convective Heat Transfer Enhancement in Hybrid Triply Periodic Minimal Surface Lattice Structure

This work details a numerical analysis of convective heat transfer augmentation in compliant triply periodic minimal surface (TPMS) lattice structures, concentrating on hybrid Gyroid‐Diamond configurations. Systematic parametric simulations assessed the impact of the transition parameter (Φ = 0–1) and relative density (20%–40%) on thermohydraulic performance.The results indicate that hybrid TPMS structures significantly improve thermal efficiency by generating intricate secondary flow patterns and vortical structures. Specifically, the configuration with Φ = 0.25 exhibits the highest surface‐area‐to‐volume ratio, while Φ = 0.5 induces the most intense vorticity (778.18 s −1 ) and wall shear stress (threefold greater than Φ = 0.25). At a relative density of 30%, Compared with Diamond and Gyroid structures, that is, when Φ = 0 and 1, when Φ = 0.25, the heat transfer rate of G‐D mixed structure increases by 4.3% and 17.8% respectively.compared to Φ = 0.25, the Φ = 0.5 Gyroid‐Diamond hybrid achieves 49.87% greater convective heat transfer efficiency. The pure Gyroid structure (Φ = 0) demonstrates an optimal balance between thermal performance and flow resistance, yielding the highest j/f 1/2 . These findings underscore the potential of hybrid TPMS architectures for advanced compact heat exchanger applications, where additive manufacturing enables precise geometric tailoring to meet specific thermomechanical requirements.