Abstract
Snow crystals grow in a variety forms depending on the surrounding environment such as temperature and humidity. However, the anisotropy of growth rate of snow crystals is paper has tried to describe snow crystals formation in terms of topology optimization. We have solved a matter of maximizing the thermal not solved. Therefore, it is necessary to consider the anisotropy of the growth rate of the snow crystals in various ways. This anisotropic diffusion for crystallization is realized by introducing a weighting function depending on the angle to describe the anisotropy of growth rate of snow crystals. It is found that the simulation results obtained by introducing the weight function were very similar to the shape of several types of snow crystals.