Üçlü periyodik minimal yüzeylere sahip jiroit tipi yapilarin akiş ve isi transferi karakteristiklerinin sayisal analizi

The popularity of additive manufacturing has increased interest in using triply periodic minimal surfaces (TPMS) in engineering applications due to their potential for superior mechanical, heat, and mass transfer properties. This study aims to understand the relationship between the properties defining gyroid TPMS structures, energy losses, heat transfer, and flow structure. For this purpose, the pressure drop-flow rate characteristics of two printed TPMS structures are measured in the first stage. The TPMS structures have the same porosity but differ in the frequency of gyroids. Later, flow simulations are conducted by using two methods: implicit unsteady incompressible Large Eddy Simulations (LES) equations along with the subgrid-scale model and steady incompressible Reynolds Averaged Navier -Stokes (RANS) equations along with the k-epsilon turbulence model. Although the simulated pressure drops do not perfectly match the measured ones, the experiments and simulations show that TPMS with high frequency creates less pressure drop over the whole range of mass flow rates. The simulation results revealed the same heat transfer rate characteristic for both frequencies. The difference in the pressure drop is investigated by looking at how much energy dissipation occurs near and away from the wall.