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以分形理论的DLA模型为基础建立了霜晶生长的二维模型,并进行计算机模拟.模拟过程中通过改变程序运行循环次数和随机粒子产生的几率从而得到不同条件下霜晶形成及生长过程的模拟图像.利用显微镜对霜晶体的形态进行观察并结合高像素数码相机拍摄到霜晶形成及生长过程中不同时刻的图像.模拟图像与实验图像的对比结果表明两者在形态上取得较好的一致,分形维数相近,从而证实采用程序运行的循环次数来代表霜晶生长时间,通过改变产生随机粒子的几率来模拟霜晶生长过程的密度变化的技术路线是可行的.研究结果表明,用这种分形理论模型模拟霜晶形成及生长过程能够取得较好的效果.论文也对该模型的不足做了客观的分析.
Based on the DLA model of fractal theory, a two-dimensional model of frost growth was established and the computer simulation was carried out. In the simulation process, the formation and growth of frost crystals under different conditions were obtained by changing the number of cycles and random particle generation The images were observed with the help of a microscope and the images of the frost crystals were recorded at different time points in combination with the high-resolution digital camera.The results of the comparison between the simulated images and the experimental images showed that the morphology of the frost crystals was better Consistent and fractal dimension, it proves that it is feasible to use the number of cycles of program to represent the growth time of frost and to simulate the density change of frost growth by changing the probability of generating random particles. The results show that using This fractal theory model can simulate the formation and growth of frost crystals can achieve better results.This paper also made an objective analysis of the deficiencies of the model.