CFD modelling to analyze the droplets deposition behavior on vibrating rice leaves

文献类型： 外文期刊

第一作者： Qiu, Wei

作者： Qiu, Wei;Guo, Hongbin;Zheng, He;Cao, Yubin;Fang, Jie;Zhai, Changyuan;Yu, Hongfeng;Lv, Xiaolan;Zhai, Changyuan

作者机构：

关键词： Leaf vibration; Rice leaves; Deposition behavior; CFD simulation

期刊名称：COMPUTERS AND ELECTRONICS IN AGRICULTURE （ 影响因子：6.757； 五年影响因子：6.817 ）

ISSN： 0168-1699

年卷期： 2022 年 201 卷

页码：

收录情况： SCI

摘要： The external airflow and the auxiliary airflow of air-assisted application make the leaves vibrate during oper-ation. Such vibration affects the deposition behavior of spray droplets on the leaves. In this study, A multiphase flow computational fluid dynamics (CFD) simulation model was developed and validated. Dynamic process simulations were performed using a validated CFD simulation model, which set spray droplet particle size, impact velocity, leaf tilt angle, and rotational angular velocity as variables. The simulation test results revealed that: the droplet velocity and leaf tilt angle were crucial factors affecting the deposition behavior of droplet adhesion, bouncing, and splitting; compared to static leaves, leaf vibration did not impact the deposition behavior selection of droplets under the influence of 5-10 m/s air velocity. However, the increase of leaves rotation angular velocity increased the droplet spreading to a certain degree. The CFD model validation test results conform with the simulation results. More specifically, the relative error of the longitudinal spreading factor was within 10% and the relative error of the spray droplet spreading diameter was within 20%. This study provides CFD models that can be used for the study of spray droplet deposition behavior on the surface of vibrating rice leaves, thereby providing a reference for rice plant protection and the selection of pesticide application parameters.

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