通过开发CFD-VOF-DPM模型,了解稀释对含有颗粒的农药液滴沉积在米叶上的稀释效应
Wang Chaoxi1, Cao Yubin1, Chen Yunfu1
1College of Engineering, Nanjing Agricultural University, Nanjing, China.
Pest management science
|May 28, 2024
概括
优化杀虫剂稀释可以增强大米叶上的沉积. 较低的稀释率增加粘附性,改善农药的利用率,减少环境污染. 这项研究有助于制定有效的作物保护战略.
科学领域:
- 农业科学 农业科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 杀虫剂稀释对于植物保护至关重要,但其对叶子滴滴沉积的影响尚未完全理解.
- 农药溶液中的颗粒添加剂可以影响沉积行为.
- 了解稀释效应是提高农药有效性和安全性的关键.
研究的目的:
- 分析颗粒含量对农药滴滴沉积在叶子表面的影响.
- 为了研究不同稀释条件下的大米叶上的农药滴的动态行为.
- 为了确定最佳的杀虫剂稀释,以有效地沉积和减少对环境的影响.
主要方法:
- 使用计算流体动力学 (CFD) 模型与流体体积 (VOF) 和离散相模型 (DPM) 相结合.
- 该模型模拟了各种硫胺溶液稀释的滴滴沉积特征.
- 在不同稀释级别中分析了叶上的水滴的动态行为.
主要成果:
- 经过100倍稀释的杀虫剂滴滴显示了较低的收缩率,促进了叶子沉积.
- 低稀释 (高度) 增加了水滴对大米叶的附着性,减少反弹并增强沉积.
- 高冲击速度与低稀释阻碍了滴滴的传播,可能导致过度使用.
结论:
- 了解农药溶液稀释因子和调整喷嘴压力可以提高农药利用率.
- 优化稀释和喷技术可以显著减少环境农药污染.
- 这些发现为米植物保护和喷技术开发提供了宝贵的见解.
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