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Dynamic stratified porosity computation from canopy interaction simulation between airflow and leaves.
Huiyuan Cui1, Chengde Wang2, Fadian Lu2
1College of Mechanical & Electronic Engineering, Shandong Agricultural University, Tai'an, China.
Frontiers in Plant Science
|November 3, 2023
Summary
This study developed a new numerical simulation method to predict how airflow affects cotton canopy porosity and leaf movement. This research improves understanding of assisted airflow for uniform spray deposition in agriculture.
Area of Science:
- Agricultural Engineering
- Computational Fluid Dynamics
- Biophysics
Background:
- Wind-driven spraying aims for uniform droplet deposition in crop canopies.
- Current methods lack effective ways to model dynamic canopy porosity and airflow attenuation.
- Complex plant structures hinder precise spray delivery analysis.
Purpose of the Study:
- To analyze the relationship between assisted airflow and cotton canopy structural parameters.
- To propose a novel method for predicting and simulating dynamic canopy porosity.
- To understand airflow-leaf interactions for optimized spray deposition.
Main Methods:
- Developed a two-way fluid-structure interaction model using Lattice Boltzmann (LB) and Finite Element (FE) solvers.
- Simulated cotton leaf deformation and airflow field distribution.
- Validated the model using indoor measurements and Computational Fluid Dynamics (CFD) post-processing with image analysis for porosity calculation.
Main Results:
- The numerical simulation showed high accuracy, with a maximum Normalized Mean Absolute Error (NMAE) below 20.72% and R² of 0.9221 compared to measurements.
- The validated CFD model successfully predicted leaf deformation and porosity changes under various wind conditions.
- The study revealed significant interactions between crop leaves and airflow dynamics.
Conclusions:
- The developed two-way fluid-structure interaction model effectively simulates dynamic canopy porosity.
- This method provides a reliable tool for understanding airflow behavior within crop canopies.
- Findings will enhance the understanding of assisted airflow effects on spray deposition, aiding agricultural practices.
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