风速对雨滴形状和下落速度的影响

Luo Huiguo, Jia Ning, Jiang Juanping, He Qi
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引用次数: 0

摘要

为了研究不同风速对雨滴形状和速度的影响,首先忽略其他因素,讨论不同风速对雨滴形状的影响。通过Beard和Chuang模型发现,当雨滴直径大于1mm时,雨滴发生变形,然后水平风速仅在水平风应力和空气阻力的作用下影响雨滴最终速度的变化。水平风速促进末端雨滴的产生。当水平风应力和空气阻力平衡时,雨滴水平的末端将在短时间内达到稳定状态。风速越大,终端速度越大。通过以上结论,可以知道降雨的大小和分布,从而可以提前知道天气状况,并可以应用于农业和绿色生活领域。此外,如果将图像采集的原理应用于利用光学仪器对雨滴图像进行处理,则可以在气象科学研究中发挥极其重要的作用。
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Effects of Wind Speed on Shape and Fall Velocity of Raindrops
In order to study the effects of different wind speeds on the shape and speed of raindrops, other factors were first ignored to discuss the effects of different wind speeds on the shape of the raindrops. Through the Beard and Chuang models, it is found that the raindrops deform when the raindrop diameter is larger than 1mm, and then the horizontal wind speed affects the change of the final velocity of the raindrops under the effect of only the horizontal wind stress and the air drag force. The horizontal wind speed promotes the generation of the end of the raindrop. When the horizontal wind stress and the air drag force are balanced, the end of the raindrop level will reach a steady state in a short time. The greater the wind speed, the greater the end velocity. Through the above conclusions, the size and distribution of rainfall can be known, so that the weather conditions can be known in advance, and applications can be applied in agriculture and green living fields. In addition, if the principle of image acquisition is applied to the use of optical instruments to process raindrop images, it can play an extremely important role in meteorological science research.
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