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利用计算机断层扫描技术获取了泡沫镍的重建结构,将蒙特卡罗法与八叉树算法结合进行泡沫镍孔尺度辐射传递建模,分析了八叉树算法对辐射传递计算的加速作用。结果表明,采用八叉树算法的辐射特性计算值与未采用时相比,最大相对误差小于1‰。在最优空间深度范围内,空间深度越大和模型面元越多,计算的加速效果越明显。
The reconstructed structure of nickel foam was obtained by computerized tomography (CT) technique. The Monte Carlo method and octree algorithm were combined to model the bubble-size bubble emission. The accelerating effect of octree algorithm on radiative transfer calculation was analyzed. The results show that the maximum relative error is less than 1 ‰ compared with the non-used eigenvalue calculated by the octree algorithm. Within the optimal depth of space, the greater the depth of space and the more bins of model, the more obvious the acceleration effect is.