critical friction velocity 临界水深 ; 临界磨擦流速
corrected friction velocity 起沙机理
turbulent friction velocity 乱流摩擦速度
friction velocity of bucket 反弧段摩阻流速
When the diameter was increased, the threshold friction velocity there is first an ascending then a decline trend.
临界摩擦速度U_(*t)随着粒径的增加呈先增大后减小趋势。
参考来源 - 半干旱区气溶胶散射、吸收特性及起沙通量的初步研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Both the ratio of friction velocity to free stream wind velocity and the thickness of airflow are subject to the sidewall effect, showing the increase trend with the decreasing aspect ratios.
随着风洞宽高比的减小，断面内中垂线上的气流摩阻速度与自由流速的比值以及受风洞边壁影响的气流厚度均增大。
The falling object, after traveling a certain distance through the air reaches a final speed, or "terminal velocity," because the object's friction with the air slows the fall.
物体在下落一定距离后由于空气阻力都会达到一个终极速度。
Experiments are made on locomotion force, velocity, locomotion ability on surfaces with different friction coefficients, and pose of the head cabin.
对机器人的牵引力、运动速度、在不同摩擦系数介质表面上的运动能力、头舱姿态进行了试验。
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