Study on double droplets simultaneously impinging on inclined wall by CLSVOF method in corrugated plate dryer

It is a common phenomenon for droplets to impinge on wall in corrugated plate dryer. In this paper, the numerical simulation of double droplets impinging on the inclined wall simultaneously is carried out by CLSVOF method(Coupled Level-Set and VOF Model). The morphology, pressure, daughter droplets distribution and central sheet width of double droplets impinging on the inclined wall along the longitudinal and crosswise directions are analyzed. It is found that the pressure at the central sheet position decreases with the increase of inclined angle in the early stage, and increases with the increasing of inclined angle in the later stage in crosswise directions, which is because the pressure change in the early stage is mainly caused by the velocity component of perpendicular to the wall direction, while the pressure change in the later stage is mainly caused by velocity component of the droplets along the wall direction. However, the impingement along the longitudinal direction is easier to generate splash phenomenon than the impingement along the crosswise direction, and the quantity of daughter droplets is more. The width of central sheet decreases with the increasing angle when droplets impinge along the longitudinal direction,but increases with the increasing angle when droplets impinge along the crosswise direction. • Morphology of double droplets impinging simultaneously is studied. • Distribution of daughter droplet diameter is analyzed. • Central sheet between droplets is studied.