Exploring the Design Space of the Effective Thermal Conductivity, Permeability, and Stiffness of High-Porosity Foams
Exploring the Design Space of the Effective Thermal Conductivity, Permeability, and Stiffness of High-Porosity Foams
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DOI：
10.1016/j.matdes.2023.112027
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
Silven Stallard;Huan Jiang;Yanyu Chen;T. Bergman;Xianglin Li
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文献类型：
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作者：
Silven Stallard;Huan Jiang;Yanyu Chen;T. Bergman;Xianglin Li
只要知道多孔结构的几个有效性质，就可以迅速确定该结构对给定系统的适用性。这项研究数值模拟了高孔隙率结构的有效导热系数，渗透率和刚度。常用的各向同性架构的多孔结构进行比较，与市售的随机金属泡沫。这些结构包括体心立方晶格、基于壳的三周期极小曲面以及由梁和壳组成的具有多个可调参数的混杂泡沫。模拟的有效性能触及在热传递，流体流动和机械应力的情况下的适用性。结构的无量纲有效性能以图形形式呈现，以清楚地说明结构相关的性能。与随机金属泡沫相比，建筑结构（BCC，TPMS和大多数HF）表现出更高的有效导热系数和渗透率。这表明通过用结构化泡沫代替随机泡沫来提高热或流体流动系统的效率的潜力。此外，HF结构显示出特定性质的广泛可调谐性。所有模拟的有效特性都是无量纲的，仅反映拓扑结构的影响，并绘制在图表中显示趋势。这些图表可以帮助在不同的应用中选择多孔结构。
With knowledge of only a few effective properties of a porous structure, the applicability of the structure for a given system can quickly be determined. This study numerically simulates the effective thermal conductivity, permeability, and stiffness of high porosity structures. Commonly used isotropic architected porous structures are compared with commercially available stochastic metal foams. The architected structures include body-centered cubic (BCC) lattice, shell-based triply periodic minimal surface (TPMS), and hybrid foam (HF) composed of beam and shell with multiple adjustable parameters. The simulated effective properties touch on the applicability in heat transfer, fluid flow, and mechanically stressful situations. The dimensionless effective properties of the structures are presented in graphical form to clearly illustrate structurally dependent properties. Compared to the stochastic metal foams, the architected structures (BCC, TPMS, and most HF) showed higher effective thermal conductivities and permeabilities. This indicates a potential to improve the efficiency of a thermal or fluid flow system by replacing the stochastic foam with architected foam. Additionally, the HF structure shows broad tunability of specific properties. All effective properties simulated were rendered dimensionless to only reflect the impact of topology, and plotted in charts to show trends. These charts can aid in the selection of porous structures in diverse applications.