Aerodynamic Behavior of Snowflakes on an Uneven Road Surface during a Snowstorm  

作　　者：Kojima Tetsuya Yoichi Yamagishi Shigeo Kimura Kengo Sato 

机构地区：[1]Meteorological Research Institute for Technology Co., LTD., Tokyo, Japan [2]Department of Mechanical Engineering, Kanagawa Institute of Technology, Kanagawa, Japan [3]National Research Institute for Earth Science and Disaster Resilience, Yamagata, Japan

出　　处：《Open Journal of Fluid Dynamics》2017年第4期696-708,共13页流体动力学（英文）

摘　　要：The removal of snow from a road or railroad results in an uneven surface and thus the formation of snowdrifts. However, the effect of a surface bump on the scale of a snowdrift is not clear. Snowdrift wind tunnel tests have long been performed to predict the snow cover distribution due to a snowstorm. However, such tests require a large-scale experimental device, have high installation and maintenance costs, and are not easy to perform. The present study thus used a small water tunnel that is easier to implement. The snowdrift pattern for the real phenomenon of a cube model was reproduced using the small water tunnel and the performance of the tunnel thus verified. The snowdrift water tunnel was then used to predict the snowdrift distribution for uneven surfaces. The tunnel well reproduced the snow cover distribution when the sedimentation velocity ratio and Stokes number in the water tunnel test were the same as those for the real phenomenon, again verifying the performance of the water tunnel test.The removal of snow from a road or railroad results in an uneven surface and thus the formation of snowdrifts. However, the effect of a surface bump on the scale of a snowdrift is not clear. Snowdrift wind tunnel tests have long been performed to predict the snow cover distribution due to a snowstorm. However, such tests require a large-scale experimental device, have high installation and maintenance costs, and are not easy to perform. The present study thus used a small water tunnel that is easier to implement. The snowdrift pattern for the real phenomenon of a cube model was reproduced using the small water tunnel and the performance of the tunnel thus verified. The snowdrift water tunnel was then used to predict the snowdrift distribution for uneven surfaces. The tunnel well reproduced the snow cover distribution when the sedimentation velocity ratio and Stokes number in the water tunnel test were the same as those for the real phenomenon, again verifying the performance of the water tunnel test.

关 键 词：SNOWSTORM Water Tank MODEL SNOW BUMP MODEL SNOWDRIFT Distribution Numerical Analysis 

分 类 号：R73[医药卫生—肿瘤]