Dynamic spreading characteristics of droplet impinging soybean leaves
Keywords:
soybean leaves, deposition efficiency, Fluent, droplet impact, spreading features, dynamicAbstract
The study on the deposition efficiency of pesticide droplets on soybean leaves can provide the basis for reducing pesticide quantity and increasing pesticide efficiency during the application of soybean plant protection machinery. The movement behavior of droplet impinges on the plant leaf surface is affected by many factors, among which the most important and the easiest to adjust are spray droplet size and impingement velocity. By changing the droplet size and impact velocity and using Fluent simulation software, the pesticide droplet hitting the soybean leaf surface was simulated and a test platform was established to verify the simulation results. The conclusions are as follows: The longitudinal roughness of soybean leaves is higher than the transverse roughness, the longitudinal pressure of soybean leaves is higher than the transverse pressure during the impact process, and the velocity of droplet spreading along the longitudinal is lower than that of spreading along the transverse; although soybean leaf surface has high adhesion, droplet losses still exist when droplet impact velocity is relatively high. The maximum spreading diameter of the droplet increases first and then decreases with the increase of impact velocity. At the same time, the maximum spreading diameter of droplet increases with the increase of particle size. The droplet deposition was best at 1.34 m/s impact velocity and 985 μm particle size. This conclusion can provide optimal operation parameters for soybean plant protection operation which can be used to guide soybean plant protection operation, improve control effect, reduce quantity and increase efficiency. Keywords: soybean, deposition efficiency, Fluent, droplet impact, spreading features, dynamic DOI: 10.25165/j.ijabe.20211403.6274 Citation: Li H, Niu X X, Ding L, Tahir A S, Guo C L, Chai J J, et al. Dynamic spreading characteristics of droplet impinging soybean leaves. Int J Agric & Biol Eng, 2021; 14(3): 32–45.References
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[2] Yang F B, Xue X Y, Cai C, Zhou Q Q, Sun Z. Atomization performance test and influence factors of aviation special centrifugal nozzle. Transactions of the CSAM, 2019; 50(9): 96–104. (in Chinese)
[3] Tian Z W, Xue X Y, Li L, Cui L F, Wang G, Li Z J. Research status and prospects of spraying technology of plant-protection unmanned aerial vehicle. Journal of Chinese Agricultural Mechanization, 2019; 1: 37–45. (in Chinese)
[4] Qin M X, Zhang X H, Tang C L. Experimental study on the droplet impact on solid surface with different roughness. Journal of Xi'an Jiaotong University, 2017; 51(9): 26–31. (in Chinese)
[5] Hilz E, Vermeer A W P. Spray drift review: The extent to which a formulation can contribute to spray drift reduction. Crop Protection, 2013; 44(20): 75–83.
[6] Wang S, Li H L, Duan H, Cui Y T, Sun H, Zhang M J, et al. Directed motion of an impinging water droplet—seesaw effect. Journal of Materials Chemistry A, 2020; 8(16): 7889–7896.
[7] Boukhalfa H H, Massinon M, Belhamra M, Lebeau F. Contribution of spray droplet pinning fragmentation to canopy retention. Crop Protection, 2014; 56: 91–97.
[8] Nairn J J, Forster W A, van Leeuwen R M. ‘Universal’ spray droplet adhesion model–accounting for hairy leaves. Weed Research, 2013; 53(6): 407–417.
[9] Damak M, Mahmoudi S R, Hyder N. Enhancing droplet deposition through in-situ precipitation. Nature Communications, 2016; 7(1):12560. doi: 10.1038/ncomms12560.
[10] Liang C. Numerical study on the dynamic characteristics of liquid droplets impinging on solid wall and thin liquid film. Master dissertation. Chongqing: Chongqing University, 2013; 106p. (in Chinese)
[11] Bi F F, Guo Y L, Shen S Q, Chen J X, Li C Q. Experimental study of spread characteristics of droplet impacting solid surface. Acta Physica Sinica, 2012; 61(18): 293–298. (in Chinese)
[12] Xie Y X, Mu S, Chen X M, Liu S S, Wu J, Wang H. Experiment research and simulated analysison spreading characteristics of droplet impacting wolfberry leaf. Journal of Chinese Agricultural Mechanization, 2019; 7: 70–74. (in Chinese)
[13] Wang P, Qi L J, Li H, Ji R H, Wang H. Influence of plant leaf surface structures on droplet deposition. Transactions of the CSAM, 2013; 44(10): 75–79. (in Chinese)
[14] Zheng Z W, Li D S, Qiu X Q, Zhu X L, Ma P Y, Zhang D. Numerical
analysis of effect of impacting velocity on diesel droplet impacting on inclined surface. Transactions of the CSAM, 2016; 47(8): 317–324. (in Chinese)
[15] Liang C, Wang H, Zhu X, Ding Y D, Liao Q. Numerical simulation of dynamic process of droplet impacting on different wetted surfaces. Journal of Chemical Industry and Engineering (China), 2013; 64(08): 2745–2751. (in Chinese)
[16] Liu D M, Zhou H P, Zheng J Q, Ru Y. Oblique impact behavior of spray droplets on tea tree leaves surface. Transactions of the CSAM, 2019; 50(5): 96–103, 195. (in Chinese)
[17] Li D S, Qiu X Q, Zheng Z W, Cui Y J, Ma P Y. Numerical analysis of droplet impact on surfaces with different wettabilities. Transactions of the CSAM, 2015; 46(7): 294–302. (in Chinese)
[18] Zhao H, Song J L, Zeng A J, He X K. Relationship between dynamic surface tension and droplet diameter. Transactions of the CSAM, 2009; 40(8): 74–79. (in Chinese)
[19] Ding L, Yang L, Zhang D X, Cui T, Gao X J. Optimization design and experiment of corn air suction seed metering device seed plate based on DEM-CFD coupling method. Transactions of the CSAM, 2019; 50(5): 50–60. (in Chinese)
[20] Ding L, Yang L, Wu D H, Li D Y, Zhang D X, Liu S R. Simulation and experiment of corn air suction seed metering device based on DEM-CFD coupling method. Transactions of the CSAM, 2018; 49(11): 48–57. (in Chinese)
[21] Song Y C, Wang C H, Ning Z. Computation of incompressible two-phase
flows by using CLSVOF method. Transactions of the CSAM, 2011; 42(7): 26–31, 60. (in Chinese)
[22] Zhang H. Droplet Impact Dynamics on Randomly Rough Surfaces: A Computational Study. Master dissertation. Suzhou: Suzhou University, 2015; 65p. (in Chinese)
[23] Liu Y H, Andrew M, Li J, Yeomans J M. Symmetry-breaking in drop bouncing on curved surfaces. Nature Communications, 2015; 6(1): 10034. doi: 10.1038/ncomms10034.
[24] Li X Y. Experimental and theoretical studies of water droplet impacting dry solid surfaces. Doctoral dissertation. Dalian: Dalian University of Technology, 2010; 125p. (in Chinese)
[25] Dong X. Systematic investigation of 3-dimentional spray droplet impaction on leaf surfaces. Doctoral dissertation. China Academy of Agricultural Mechanization Sciences, 2013; 132p. (in Chinese)
[26] Pan Z Z. Study on the preparation of Lambda-cyhalothrin Nanosuspension. Master dissertation. Changchun: Jilin University, 2015; 78p. (in Chinese)
[27] Cui Y T, Qin C B, Zhang Z, Liu D Q, Dong H F, Zhang K F, et al. Experimental study on the impact of droplets on the surface of soybean leaves. Soybean Science, 2018; 37(6): 961–968. (in Chinese)
[28] Gil E, Balsari P, Gallart M, Llorens J, Marucco P, Andersen P G, et al. Determination of drift potential of different flat fan nozzles on a boom sprayer using a test bench. Crop Protection, 2014; 56: 58–68.
[29] Versteeg H K, Malalasekera W. An introduction to computational fluid dynamic: The finite volume method. New York: Wiley, 1995; 257p.
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Published
2021-06-11
How to Cite
Li, H., Niu, X., Ding, L., Tahir, A. S., Guo, C., Chai, J., … Shang, Z. (2021). Dynamic spreading characteristics of droplet impinging soybean leaves. International Journal of Agricultural and Biological Engineering, 14(3), 32–45. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6274
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Applied Science, Engineering and Technology
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