Abstract
An aerosol particle collection by liquid droplets has been applied in many industries. One example of this is the radioactive aerosol removal system in the safety system of the nuclear reactor. However, the mechanism related to the removal of fine particles through the gas-liquid interface is not clear. In the present study, the direct observation of micro-scale aerosol particle behavior on gas-liquid interface was performed to clarify the aerosol particle capturing behavior by droplets. The experiment was performed under the condition simulating the relative velocity between the droplet and the aerosol particle by fixing the droplet to the tip of the syringe needle in order to observe micro-scale CsI aerosol particles with a high-speed video camera with objective lens. We confirmed three cases of the capturing behavior; “particle penetration into the drop”, "deposition on the droplet interface" and "deposition on the interface after moving to slide on the droplet interface". Especially, “particle penetration into the drop” and "deposition on the interface after moving to slide on the droplet interface" are new capturing behavior model which are not considered in previous studies.
