Abstract
In a room of an aquarium with a breeding sea tank, if sea salt particles are dispersed from the water surface of the sea tank into the room air during aeration and diffused by the room airflow, they may adhere to metal parts, thereby contributing to the generation of rust. In order to investigate an efficient method of removing sea salt particles from the seawater tank by ventilation or air conditioning suction, we analyzed the mobility of sea salt particles in an aquarium room in which a tank containing seawater is placed using computational fluid dynamics. As a result, sea salt particles generated on the seawater surface near the outlet reached the outlet in 60 to 120 s after generation without diffusing into the room when the surrounding airflow was calm, and the recovery rate after 300 s was 75%. On the other hand, when the seawater surface was close to the blowing airflow and the velocity was high, sea salt particles generated on the seawater surface diffused over a wide area and took 240 to 300 s after generation to reach the outlet, and the recovery rate after 300 s was 20%.
