THE EFFECT OF NOZZLE DIAMETER ON MOSQUITO FOGGING SPRAY DROPLET SIZE CHARACTERISTICS

Abstract

Fogging technology is used in space spray applications to control adult mosquitos. A forger is a device that uses very small droplets to disperse liquid chemicals over large areas and due to the small droplet size, the chemicals are able to disperse and penetrate deep foliage, killing mosquitos in narrow spaces. Hence, the aim of this study is to investigate the relationship between the effect of nozzle diameter on the flow velocity pattern and droplets size distribution. A convergent-divergent nozzle is designed and designed to understand the basic concept on how a nozzle works. The convergent and divergent part are analysed separately to understands its velocity pattern and droplets size distribution to identify the best and effective nozzle size which can able to deep foliage and kill adult mosquitoes effectively. The nozzles are designed using the CATIA V5 software implanted in the ANSYS software to analyses complex problems involving gas and fluid-gas interaction and to study the droplets distribution. Furthermore, MATLAB software will be used to observe the morphology of the droplets and identify the density of the droplets. In the first phase of study, the analysis of the nozzle design has been carefully and theoretically investigated. Based on theoretical calculations, a nozzle with the concept of convergent-divergent nozzle was designed with correct diameter on fluid-flow and droplets size distribution will be numerically investigated in the following phase of research