基于物理的雾凇生长模拟算法

Physics-based algorithm for natural rime growth simulation

为了实现冬季中常见的2种雾凇——软凇和硬凇的模拟,通过研究2种雾凇在不同风速、温度等生长环境下的形态,提出了一种基于物理的雾凇生长动态模拟算法。采用热力学原理建立的覆冰模型计算雾凇的长度,并结合扩散限制凝聚方法,以每个雾凇生长点为凝聚核对软凇的形态进行模拟,利用分节计算生长终点方法来模拟硬凇的形态。同时引入柏林噪声函数,通过构造随机噪声函数、平滑函数等方法来实现风场的模拟。实验结果表明,该方法能够真实、有效地模拟自然界中的软凇和硬凇。

In order to simulate two main kinds of rime in winter,the soft rime and the hard rime,an algorithm for rime growth simulation based on physics is proposed in this paper by analyzing the morphology of two kinds of rime under different wind speeds and temperatures.The algorithm calculates the length of rime by using the icing conductor model based on the principle of thermodynamics.After that,the method of diffusion limited aggregation is introduced to our algorithm to simulate the morphology of the soft rime with each growing point of the rime as a condensation nuclear,and a segmentation method is for the simulation of the needle-like rime’s morphology;Perlin noise function is used to simulate wind field by constructing stochastic noise function and smoothing function.The experimental results show that this method can simulate the soft rime and the hard rime in the nature realistically and efficiently.