Three-dimensional simulation of interfacial convection in CO_2–ethanol system by hybrid lattice Boltzmann method with experimental validation  

CO_2-乙醇体系中界面对流的混合格子Boltzmann方法三维模拟及实验验证(英文)

作　　者：陈炜 陈淑勇 袁希钢 张会书 余国琮 

机构地区：[1]State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University

出　　处：《Chinese Journal of Chemical Engineering》2015年第2期356-365,共10页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(20736005)

摘　　要：By using a hybrid lattice-Boltzmann–finite-difference method(hybrid LBM–FDM method),three-dimensional simulations of solutal interfacial convection were conducted for the process of CO2absorption into ethanol.A self-renewal interface model is adopted as an interfacial perturbation model.The simulation results revealed some three-dimensional features of the induced interfacial convection,such as the development of diverging cellular flow and Rayleigh plume-like convection in liquid phase.The concentration distribution of the simulation result is validated and found to be in well agreement with the Schlieren visualization results qualitatively.Additionally,the mass transfer enhancements by interfacial convection were investigated via both simulation and experiment for the absorption process,and the mass transfer is shown to be enhanced by the interfacial convection by about two-fold comparing with that by diffusion.By using a hybrid lattice-Boltzmann–finite-difference method（hybrid LBM–FDM method）,three-dimensional simulations of solutal interfacial convection were conducted for the process of CO2absorption into ethanol.A self-renewal interface model is adopted as an interfacial perturbation model.The simulation results revealed some three-dimensional features of the induced interfacial convection,such as the development of diverging cellular flow and Rayleigh plume-like convection in liquid phase.The concentration distribution of the simulation result is validated and found to be in well agreement with the Schlieren visualization results qualitatively.Additionally,the mass transfer enhancements by interfacial convection were investigated via both simulation and experiment for the absorption process,and the mass transfer is shown to be enhanced by the interfacial convection by about two-fold comparing with that by diffusion.

关 键 词：Hybrid LBM–FDM Solutal interfacial mass transfer Interfacial convection Mass transfer rate Schlieren technique 

分 类 号：TQ021.1[化学工程]