论文标题
模拟雪的等温老化
Simulating isothermal aging of snow
论文作者
论文摘要
提出了一种模拟雪的等温再结晶过程的蒙特卡洛算法。通过两个质量重新分布过程，表面扩散和升华沉积，雪变质近似。该算法是合理的，并确定其参数化。将模拟结果与实验数据进行比较，尤其是特定表面积和冰厚度的时间演化。我们发现，表面扩散和升华沉积的两种影响可以准确地模拟雪的异常变质的许多方面。此外，结果表明，升华沉积是接近熔点的温度的主要贡献，而表面扩散在远低于熔点的温度下占主导地位。实施了简单的重力压实近似值以模拟密度变化。
A Monte Carlo algorithm to simulate the isothermal recrystallization process of snow is presented. The snow metamorphism is approximated by two mass redistribution processes, surface diffusion and sublimation-deposition. The algorithm is justified and its parametrization is determined. The simulation results are compared to experimental data, in particular, the temporal evolution of the specific surface area and the ice thickness. We find that the two effects of surface diffusion and sublimation-deposition can accurately model many aspects of the isothermal metamorphism of snow. Furthermore, it is shown that sublimation-deposition is the dominant contribution for temperatures close to the melting point, whereas surface diffusion dominates at temperatures far below the melting point. A simple approximation of gravitational compaction is implemented to simulate density change.
