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Related Concept Videos

Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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A spray tank system is engineered to uniformly distribute a pest-control liquid across plants by using a pressurized mechanism. The tank, pressurized to 150 kPa, holds the pesticide at a height of 0.80 meters. Liquid flows from the tank through a 1.9 meter pipe with a diameter of 0.015 meters, angled at 0.698 radians, ultimately reaching a 0.007 meter nozzle that sprays the pesticide. Accurate calculation of the system's flow rate is crucial to ensure uniform application, and this is...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Related Experiment Video

Updated: Jul 15, 2025

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
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Spraying performance of umbrella wind-field-type atomization and its application to parameter optimization.

Shaobo Li1, Jianping Li1, Ruirui Zhang2

  • 1College of Electrical and Mechanical Engineering, Hebei Agricultural University, Baoding, China.

Pest Management Science
|October 5, 2023
PubMed
Summary

An umbrella wind-field anti-drift spraying device improves spray deposition in fruit trees. Optimized airflow and parameters significantly reduce spray drift and off-target deposition, enhancing application efficiency.

Keywords:
airflow velocityanti-drift devicedroplet depositspray driftumbrella wind fieldwind tunnel

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Area of Science:

  • Agricultural Engineering
  • Fluid Dynamics
  • Environmental Science

Background:

  • Spray drift and uneven deposition in fruit tree canopies are significant challenges in agricultural applications.
  • Existing spraying technologies often lead to substantial off-target deposition and reduced efficacy.

Purpose of the Study:

  • To design and optimize an umbrella wind-field-type anti-drift spraying device.
  • To improve droplet deposition within the fruit tree canopy.
  • To minimize spray drift between rows and ensure uniform deposit distribution.

Main Methods:

  • Computational Fluid Dynamics (CFD) simulations were employed for device parameter optimization.
  • Wind tunnel tests were conducted to analyze anti-drift characteristics.
  • Field tests evaluated droplet deposit and the influence of key parameters.

Main Results:

  • Optimized device achieved a 48% increase in outlet airflow velocity (24.5 m/s).
  • Mathematical models showed significant correlations (P < 0.05) between airflow, diameter, distance, and drift ratio.
  • Field tests identified side airflow velocity, spray pressure, and outlet diameter as critical factors for droplet deposit.

Conclusions:

  • The umbrella wind field effectively reduces spray drift and off-target deposition.
  • Optimized parameters, including side airflow velocity (2 m/s), spray pressure (0.4 MPa), and outlet diameter (70 mm²), maximize droplet deposit.
  • The study provides a valuable reference for understanding spray drift and deposit dynamics.