نوع مقاله : یادداشت فنی
نویسنده
پژوهشکده فوتونیک و فنآوریهای کوانتمی، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
This paper presents an analytical model based on the thermal resistance network method to determine the effective thermal conductivity of a porous cylindrical lattice with a honeycomb structure, where heat flows radially outward from the central axis. The model offers a simple, software-independent solution for thermal analysis in applications like heat exchangers and photonic crystal fibers. The methodology involves a three-stage calculation: determining the thermal resistance of the unit cells (accounting for two types: with and without a fluid-filled hole), calculating the effective conductivity for each concentric layer by considering parallel resistances, and finally summing the series resistances of all layers to find the overall effective thermal conductivity. Applied to common materials like copper, aluminum, and stainless steel with water as the filler fluid, the model reveals that the unit cell's orientation to the heat flux has a negligible impact. Furthermore, the overall effective thermal conductivity stabilizes significantly with more than five layers, providing a key design insight for optimizing thermal performance and material usage.
کلیدواژهها [English]
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