This study conducted pore-scale simulations to estimate the stagnant thermal conductivity and mechanical performance of stochastic metal foams and architected metal foams. The stagnant thermal conductivity of 5-, 10-, 20- and 40-ppi commercial aluminum foams were estimated to be 6.74, 6.49, 5.97, and 7.16 W/m/K, respectively. Thermal conductivity depended mainly on porosity and was not a strong function of pore size. The pore-scale models simulated thermal conductivities of 40-ppi Al foam along three orthogonal directions are 7.16, 7.92, and 7.56 W/m/K, respectively, indicating a strong isotropic nature. Compared with stochastic foams, the architected foam with a triply periodic minimal surface showed 103% higher thermal conductivity, 488% higher stiffness, and 265% more energy absorption capability. The findings reported here not only provide a fundamental understanding of the interplay between performance and architecture but also open a new avenue to create multifunctional foams.

这项研究进行了孔隙尺度模拟，以估算随机金属泡沫和建筑金属泡沫的停滞热导率和机械性能。5、10、20、40 ppi商用铝泡沫的停滞热导率分别估计为6.74、6.49、5.97和7.16 W / m / K。导热率主要取决于孔隙率，而不是孔径的强函数。孔隙尺度模型模拟的40ppi Al泡沫沿三个正交方向的热导率分别为7.16、7.92和7.56 W / m / K，表明其具有强的各向同性性质。与随机泡沫相比，具有三倍周期性最小表面的结构化泡沫显示出103％的热导率，488％的刚性和265％的能量吸收能力。