Comparison of dry granulation and wet agglomeration of snow

In sufficiently developed wet snow avalanches, the snow sometimes changes into rounded lumps like snowballs. This process is called "Dry granulation". On the other hand, when large-scale slush flows occur, the snow sometimes changes into rounded lumps like snowballs immersed in water. This process is called "Wet agglomeration". To simulate such succeeded in formating snowballs on both dry granulation and wet agglomeration by the use of the same new snow. As a result, the particle size distribution of snowballs in dry granulation was wider than that in wet agglomeration. And the mean particle diameter of snowballs in wet agglomeration was larger than that in dry granulation. In addition, the number of granulated snowballs in dry granulation was equal to about the square of that in wet agglomeration.