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

文献类型： 外文期刊

作者： Qiu, Wei 1 ; Guo, Hongbin 1 ; Zheng, He 1 ; Cao, Yubin 1 ; Lv, Xiaolan 2 ; Fang, Jie 1 ; Zhai, Changyuan 1 ; Yu, Hongfeng 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Engn, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Intelligent Equipment Res Ctr, Beijing 100097, Peoples R China

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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