Computation of the dynamic thermal dissipation properties of porous media by Brownian motion simulation: Application to an open-cell aluminum foam
Computation of the dynamic thermal dissipation properties of porous media by Brownian motion simulation: Application to an open-cell aluminum foam
复制标题
通过布朗运动模拟计算多孔介质的动态散热特性：在开孔泡沫铝中的应用
DOI：
10.1063/1.2786899
复制
发表时间：
2007
影响因子：
3.2
通讯作者：
X. Olny
中科院分区：
文献类型：
--
作者：
C. Perrot;R. Panneton;X. Olny
本文报道了声激励下开孔泡沫铝三维重构单胞的频率依赖性热传导的模拟结果。首先，提出了一种基于三维随机游走的算法来计算周期性复杂多孔结构的动态热渗透率或动态体积模量。其次，实施的计算算法的误差和收敛性量化的随机游走人口，归一化的捕获距离，和类型的几何形状。最后，该算法被应用到泡沫铝的动态体积模量的计算和实验室测量相比。模拟和测量之间取得了良好的协议。
This paper reports simulation results of frequency dependent heat conduction through three-dimensional reconstructed unit cells of an open-cell aluminum foam under acoustic excitations. First, a three-dimensional random walk based algorithm is proposed to calculate the dynamic thermal permeability or dynamic bulk modulus of periodic complex porous geometries. Second, the error and convergence of the implemented calculation algorithm are quantified in terms of the random walk population, normalized trapping distance, and type of geometry. Finally, the algorithm is applied to the calculation of the dynamic bulk modulus of an aluminum foam and compared to laboratory measurements. Good agreement is obtained between simulations and measurements.