A study on the self-sustaining equilibrium boundary condition of numerical simulation on snow drifting

作者：Li Xue Feng^*; Zhou Xuan Yi; Gu Ming

来源：Acta Aerodynamica Sinica, 2011, 29(6): 765-769.

• Equilibrium boundaries
• Equivalent physical roughness height
• Roughness height
• Saltation height
• Snow movement
• Wind field

Though adoption of the equivalent physical roughness height, a set of boundary condition, based on the current literature on the self-sustaining equilibrium boundary condition, is presented to simulate the wind field with snow movement. In the paper, the method of the literature is applied to fit the data from snow drifting experiments in cold laboratory firstly. By comparison, the self-sustaining equilibrium is found not to be satisfied well. In order to reach the requirement of self-sustaining equilibrium, the equivalent physical roughness height is adopted, and the relationship between the equivalent physical roughness height and the saltation height is developed. The results show that self-sustaining equilibrium is improved though setting the equivalent physical roughness height reasonably. Finally, the popularization and application of the method is verified.

• 出版日期2011
• 单位同济大学