Numerical Simulation of Flow Characteristics for Supercritical CO₂-Sprayed Polyurethane Resin.

ABSTRACT: Conventional paint spraying processes often use small molecule organic solvents and emit a large amount of volatile organic compounds (VOCs) that are highly toxic, flammable, and explosive. Alternatively, the spraying technology using supercritical CO₂ (scCO₂) as a solvent has attracted attention because of its ability to reduce VOC emissions, but the flow characteristics of coatings have not been thoroughly studied. Therefore, we numerically simulate the spraying process based on the actual process of scCO₂ spraying polyurethane coatings by computational fluid dynamics (CFD). The effects of inlet pressure and volume fraction of scCO₂ on the fluid motion parameters inside the nozzle as well as the atomization effect of droplets outside the nozzle

SUBMITTER: Li C 

PROVIDER: S-EPMC11013771 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature