|
|
Single droplet impacting onto different size non-heated surface |
School of Energy and Power, Dalian University of Technology, Dalian, Liaoning 116024, China |
|
|
Abstract Based on the finite volume solution of Navier-Stokes equations coupled with volume of fluid method (VOF), the impingement process of a droplet impacting normally onto a non-heated surface was numerically simulated. The model was validated by comparison with available experimental data for the temporal development of the spreading diameter for the impinging droplet. The effects of We, Re, L and the ratio of surface size to initial droplet diameter on the droplet deformation, the film formation and break up behavior were investigated. Calculated results show that with small wall size and large initial droplet kinetic energy, the liquid film spreads and splashes over the wall edge to form a number of secondary droplets. With the increasing of initial droplet impact energy, the splashing trend becomes violent with smaller size of secondary droplets, while secondary droplets number becomes larger with more extensive spacial distribution.
|
|
|
|
|
|
|
|