Experimental study on flow and heat transfer performance of triply periodic minimal surface structures and their hybrid form as disturbance structure

Abstract

The triply periodic minimal surface (TPMS) structure is widely used in forced convection heat transfer. Additionally, developing of parametric modeling and additive manufacturing technology makes TPMS manufacturing possible. In this work, the forced convective heat transfer performance of three standard TPMS, the Gyroid (G-type), the Diamond (D-type), and the Primitive (P-type) structures and their hybrids, the Gyroid/Diamond (GD-type), the Gyroid/Diamond (GP-type), and the Diamond/Primitive (DP-type) was studied. The pressure drop, heat transfer coefficient, and overall heat transfer performance are comprehensively investigated. The results show that for the air Reynolds number (Re) range of 412.48 to 1257.96 the average pressure drop of G-type is 43.2% and 38.86% lower than that of P-type and D-type, respectively. The important influencing factor related to pressure drop is structural characteristics. The D-type has the highest heat transfer coefficient (1398 W/m2·K) with an average value exceeding 30.83% of the G-type and 28.39% of the P-type, respectively. Hybrid GD-type and DP-type both show good heat transfer performance. The heat transfer coefficient of the GD-type is 8.41% higher than that of the G-type, and the DP-type was 4.41% higher than of the P-type.