液滴撞击单根细丝分散特性的数值模拟研究OA

The high-gravity reactor,renowned for its superior mass transfer efficiency,plays a pivotal role in carbon capture processes.The wire mesh packing serves as the primary structural element enhancing mass transfer.To fully comprehend the dispersion mechanism,it is essential to investigate the dynamics of droplets impacting on a single fiber.The volume of fluid method was employed to numerically examine the interaction between a droplet and a fiber.The effects of factors such as the initial velocity(u0),the initial diameter(D0),the impact eccentricity(e),and the impact angle(θ)on droplet deformation and dispersion characteristics were analyzed in detail.Vertical or central impacts were divided into 4 key stages:splitting,merging,stretc-hing,and breaking.In contrast,eccentric and non-vertical impacts exhibit asynchronous breaking,sliding split-ting,and oblique deformation stages.To quantitatively assess the post-impact dispersion characteristics,the di-mensionless time(t*)and the gas-liquid interfacial area growth rate(η)were introduced.The results indicate that,increasing the initial velocity,reducing the droplet diameter,minimizing the eccentric distance,and maxi-mizing the impact angle all enhance dispersion.A correlation was established to predict the maximum increase rate in gas-liquid interfacial area.