CFD aided investigation of single droplet coalescence

作     者：Felix Gebauer Mark W.Hlawitschka Hans-Jorg Bart 

作者机构：Chair of Separation Science and TechnologyUniversity of KaiserslauternKaiserslautern 67653Germany Center for Computational and Mathematical Modelling(CIVY)University of KaiserslauternKaisersloutern 67653Germany 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2016年第24卷第2期

页      面：249-252页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：the DFG for their financial support(BA 1569/55-1) 

主　　题：CFD Parameter estimation Coalescence Film drainage 

摘      要：This article describes the development of a coalescence model using various CFD work packages,and is validated using as toluene water model *** studies were performed to describe droplet interactions in liquid–liquid test *** models use adjustable parameters to describe these *** research in the past decades led to different correlations to model coalescence and breakage depending on the chemical system and the apparatus *** the complexity of droplet coalescence requires a detailed investigation of local phenomena during the droplet *** fluid dynamics(CFD) studies of single droplet interactions were performed and validated with experimental results to improve the understanding of the local hydrodynamics and film drainage during *** CFD simulations were performed for the interaction of two differently sized droplets at industrial relevant impact *** experimental verification and validation of the numerical results were done with standardized high-speed imaging studies by using a special test cell with a pendant and a free rising *** experimental based algorithm was implemented in the open source code OpenF OAM to account for the contact time and the dimple *** standard European Federation of Chemical Engineering(EFCE) test system toluene/water was used for the numerical studies and the experimental investigations as *** results of the CFD simulations are in good accordance with the observed coalescence behavior in the experimental *** addition,a detailed description of local phenomena,like film rupture,velocity gradients,pressures and micro-droplet entrainment could be obtained.