The response of porous fence to the near-surface airflow can be characterized quantitatively by sand particles threshold wind velocity.
气流对栅栏的响应可以定量地用沙粒的起动风速来表征。
The quantitative relation among the threshold wind velocity of sand movement, sand diameter and the agglutinate stress of sand bed is obtained with the mentioned dimensionless variables.
经分析得到起沙风速与沙床沙粒粒径和沙床粘结力间的数量关系。
The instantaneous moving mode of sand mass is divided into 4 types, namely: rolling, jumping, suspending, and running away, when the wind speed reaches the threshold velocity of sand-driving wind.
文章研究将沙粒在风速达到沙粒的起动风速时沙粒的瞬间起动方式分为4种，即：滚动、跳跃、悬浮和飞扬4种。
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