Dynamics simulation of vertical droplet impingement on the wall under the effect of transverse airflow
To study the effects of airflow on droplet shape changes after collision with different surfaces,the volume of fluid(VOF)method was employed to simulate droplet impingement with different surfaces with va-rious wettabilities,with the contact angles of 60°,70°,90°,120°,and 160°,at initial velocities of 0.22 and 0.44 m/s under a transverse airflow of 0.1 m/s.The results indicate that the impact velocity and the surface contact angle significantly influence droplet morphology.The impact velocity directly affects the spreading process.The high-impact velocity rapidly leads to maximum spreading.Larger contact angles reduce the time to reach the maximum spreading diameter and accelerate the attainment of maximum spreading.In the trans-verse airflow field,the wetting areas of droplets increase by 0.95％to 9.91％compared to those of the no-flow case.The research results reveal the impact of airflow on the droplet behaviors and provide practical guid-ance for optimizing droplet management in air handling systems.
transverse airflowdroplet impingementspreading and reboundingwettabilitycontact angle
万方数据
维普
