Gong, B.; Jian, A.; Zhang, J.; Yang, G.; Liu, Y. Effect of the Curvature Radius on Single-Droplet Dynamic Characteristics within a Concave-Wall Jet. Processes2024, 12, 141.
Gong, B.; Jian, A.; Zhang, J.; Yang, G.; Liu, Y. Effect of the Curvature Radius on Single-Droplet Dynamic Characteristics within a Concave-Wall Jet. Processes 2024, 12, 141.
Gong, B.; Jian, A.; Zhang, J.; Yang, G.; Liu, Y. Effect of the Curvature Radius on Single-Droplet Dynamic Characteristics within a Concave-Wall Jet. Processes2024, 12, 141.
Gong, B.; Jian, A.; Zhang, J.; Yang, G.; Liu, Y. Effect of the Curvature Radius on Single-Droplet Dynamic Characteristics within a Concave-Wall Jet. Processes 2024, 12, 141.
Abstract
The centrifugal force field in the hydrocyclone was affected by the concave-wall curvature radius R0, the mechanism of droplet deformation was closely related to the mass transfer efficiency. Numerical simulation and experimental data were collected to reveal the deformation characteristics and mechanism of single droplet crossing concave-wall jet. Normalized interfacial energy γ and stretching performance were provided to investigate the droplet deformation process. The results showed that the droplet was stretched along the streamwise and shrank along the spanwise in the concave-wall jet. The droplet interfacial energy and deformation were the largest when the droplet crossed the jet boundary at t = 0.20 s. Maximum γ value increased with the increase of R0 by 57.3% to 71.4%, and the distance between droplet and concave-wall increased with R0. Q-criterion was exported to show the vortex strength increasing as the decrease of R0 in the jet boundary. The pressure distribution inside the droplet showed that the pressure decreased as R0 increased, while the pressure difference increased along the streamwise and wall-normal direction. The study suggested that the droplet breakup was more difficult for the smaller R0, which was beneficial for liquid-liquid heterogeneous separation.
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