考虑积雪休止角的屋面积雪漂移数值模拟方法

Numerical Simulation Method About Snowdrift on Roofs With Consideration of Repose Angle of Snow

摘要:

根据风雪运动机理和屋面积雪特点，提出一种考虑积雪休止角的屋面风致积雪漂移数值模拟方法.应用此方法对一平屋盖屋面积雪重分布进行了模拟，随后分析了考虑休止角与否对屋盖雪面附近流场特性的影响，并将数值模拟结果与风洞试验结果进行了对比.结果显示，数值模拟结果与试验数据吻合较好.

Abstract:

Based on the mechanism of snowdrift and the characteristics of snow redistribution on roofs, a numerical simulation method about snowdrift on roofs was proposed with consideration of repose angle of snow. Then, the snow redistribution on a flat roof was simulated by the method. The effect of repose angle of snow on the characteristics of flow field around flat roof was also analyzed. Finally, the numerical results of snow redistribution were compared with those from wind tunnel tests. It is shown that simulation results are in good agreement with experimental data.