LIANG Chao, WANG Hong, ZHU Xun, et al. Numerical simulation of droplet impact on surfaces with different wettabilities[J]. CIESC Journal, 2013, (8): 2745-2751.
LIANG Chao, WANG Hong, ZHU Xun, et al. Numerical simulation of droplet impact on surfaces with different wettabilities[J]. CIESC Journal, 2013, (8): 2745-2751.DOI: 10.3969/j.issn.0438-1157.2013.08.006.
Dynamic behavior of an impacting water droplet was simulated with the VOF(volume of fluid)method.Droplet diameter was 2.6 mm and impacting velocity was 0.5 m·s-1.Droplet dynamic behavior on simulated
hydrophilic and hydrophobic surfaces was simulated with an impacting angle of 63?
90?
118癮nd 160?.Simulation results showed reasonably good agreement with the experiment data.Surface wettability seriously affected droplet dynamic behavior.Droplet spread well and then sticked on the hydrophilic surface.On the surface with an impacting angle of 90?
droplet partly rebounded away from the surface.While droplet totally rebounded when impacting on the hydrophobic surface.There was an edge liquid ring for liquid sticking on the droplet edge when contact line draw back.The maximum spreading factor and the time needed to arrive at the maximum spread diameter were reduced with increasing contact angle.