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Computational Fluid Dynamic Modeling Application as a Design Tool in Air Assisted Pesticide Sprayer Development

机译：计算流体动力学建模在空气辅助农药喷雾器开发中作为设计工具的应用

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The complex dynamic behaviors of air assisted pesticides spraying, especially inter-droplets interactions as well as effects of prevailing surrounding fluid environment before and after the spray breakup makes development of an ideal sprayer unattainable. Moreover, plants’ canopy architectures are sophisticated mainly due to variations in features’ orientation amongst species. A prior insight of the sprayer’s performance behavior at design phase can significantly help in avoiding unanticipated future failures. This situation has recently, inevitably paved way for the application of numerical analysis such as Computational Fluid Dynamic (CFD) modeling as a robust design tool. Furthermore, movement of spray droplets from the generator to the targets involve fluid flows, heat transfer and mass flow which are the principle fields in CFD simulation of transport phenomena. As the droplets travel, the surrounding environment is likely to interfere with their physical and chemical properties. The concern to fully utilize the technology has nowadays not only drawn the attention of manufacturing industry but has also captured the interests of researchers. Previous applications of CFD modeling have demonstrated its potential to ease the challenges of cost and time consumption that would have been encountered in physical experimental trials tests. Nevertheless, developing a standard ideal model still remains unattainable. Most researchers have developed simple model mainly of Lagrangian approach whose applications have primarily been on open-fields spraying despite the situation still remaining far underway. This paper gives a state-of-art review of the application of CFD modeling in air atomized pesticide spraying with an aim of highlighting future research needs.
机译：空气辅助农药喷洒的复杂动力学行为，尤其是小滴之间的相互作用以及在喷雾破裂之前和之后，主要的周围流体环境的影响，都无法实现理想的喷雾器。此外，植物的冠层结构非常复杂，主要是由于物种之间的特征方向不同。在设计阶段对喷涂机的性能行为进行事先了解可以极大地帮助避免意外的未来故障。最近，这种情况不可避免地为数值分析的应用铺平了道路，例如将计算流体力学（CFD）建模作为一种可靠的设计工具。此外，液滴从发生器到目标的运动涉及流体流动，传热和质量流，这是CFD模拟传输现象的主要领域。随着液滴的传播，周围的环境可能会干扰其物理和化学性质。如今，人们对于充分利用该技术的关注不仅引起了制造业的关注，而且引起了研究人员的兴趣。 CFD建模的先前应用证明了其潜力，可以缓解物理实验测试中遇到的成本和时间消耗方面的挑战。然而，开发标准的理想模型仍然是无法实现的。大多数研究人员已经开发出了一种主要采用拉格朗日方法的简单模型，尽管情况仍然很遥远，但其应用主要用于露天喷雾。本文对CFD模型在空气雾化农药喷雾中的应用进行了最新的综述，旨在突出未来的研究需求。

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