CO2 해양격리용 노즐설계를 위한 이상류 액적 수치 시뮬레이션

Abstract

As one of the promising climate change technologies to weaken the global warming, the CO2 ocean sequestration technology is being developed to mitigate the CO2 concentration in the atmosphere. Several developed countries such as Japan, Norway, USA, etc have carried out the related project, especially, focusing on \\'Moving Ship Method\\' where a special ship tows along discharge pipe. The liquified CO2 flows down through the pipe, and is charged into the deep ocean in the form of droplets. In order to predict the dilution range of the CO2 dissolved, the estimation of the volumes of the droplets emitted is significantly important. Therefore, in this paper, we studied the relationship between the extracted droplet volume and nozzle flow rate by means of a micro-CFD technique. The direct simulation code solves two-phase flow, such as a liquid-liquid, as the form of the combined Navier-Stokes equation. The position of the interface is determined by solving a transport equation of the marker density function. For the validation of the present method, we have successfully demonstrated the formation of the droplet detached from nozzle.