Simulation and visualization of spraying droplets behavior and deposition within virtual rice canopy

Abstract

Models for accurately simulating pesticide droplet deposition and transmission mechanism in rice canopies can provide an effective and economic tool to optimize methods for spraying pesticides, adjuvant formulation, and spray parameters. However, the current studies on the modeling of spray droplet deposition within rice plants are still very limited. Aiming at this problem, a method to model and visualize spray transmission and deposition within the canopy of rice plants was proposed. Firstly, a particle system was used to simulate the spraying scene of droplets. Then an improved method to determine the behavior of rebound and shatter of the droplets in the virtual scene was proposed. The deposition of spraying droplets on a leaf was calculated according to the inclination angles of the leaf, the characteristics of the leaf surface, and the physical and spatial characteristics of the droplets. The experiment shows that the method can simulate the behavior of the spraying droplets within a virtual scene of a rice plant, which may provide a reference for the study of spray deposition in the canopy of the crop.

A Review: Development of Plant Protection Methods and Advances in Pesticide Application Technology in Agro-Forestry Production

“…The simulation and modeling of pesticide transportation and deposition processes include the numerical simulation and simulation of spraying flow fields, the electric field and flow field simulation of electrostatic spraying, spraying model construction of plant protection UAVs, etc. Numerical simulation and simulation of flow fields include aerodynamic droplet trajectory models [191], dynamic distribution models of spray deposits [192], air flow field modeling [193], air velocity distribution simulations of air-assisted orchard sprayers [194], discrete-phase droplet deposition simulations [195], simulation and visualization of spraying droplets' behavior [196], moving trajectory simulation of charged droplets [197], etc. In particular, pesticide droplet drift always accompanies pesticidespraying operations, which might cause various serious consequences and research on pesticide droplet drift simulation has attracted great attention.…”

“…The deposition interaction process and behaviors (bounce, adhesion, evaporation, retention, penetration and run-off) of pesticide droplets upon reaching their target have attracted widespread attention around the world [177][178][179][180][181][182][183][184]196,[203][204][205]. The simulation and modeling of the pesticide deposition process focus on target feature simulation [204,205], droplet-to-target impact models [204], etc.…”

Wetting and deposition characteristics of air-assisted spray droplet on large broad-leaved crop canopy

“…Griesang et al research on nine types of flat fan nozzles under two flow rates and four working pressures shows that the working pressure has a great influence on the spray volume distribution, which is the lowest CV% under the pressure of 300kpa (Griesang et al, 2022). Too small droplets may drift, and too large droplets may accumulate, slide or bounce, thus affecting the spray performance (Ding et al, 2022). Therefore, choosing the appropriate nozzle type and spray pressure can effectively improve the spray quality.…”