کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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167153 | 1423403 | 2015 | 10 صفحه PDF | دانلود رایگان |

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 CO2 absorption 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.
Graphical AbstractSolutal interfacial convection for the absorption process of CO2–ethanol gas–liquid system, including Rayleigh convection and Marangoni convection, was simulated three-dimensionally by a hybrid lattice-Boltzmann–finite-difference method. The iso-surface of CO2 concentration for the simulation result was shown in Fig. 1, and plume like Rayleigh convections were induced at the left and right corners, which were found to be in well accordance with the Schlieren visualization. The induced interfacial convection could enhance the gas–liquid mass transfer about two-fold compared to that of diffusion as shown in Fig. 2 for the CO2–ethanol system, and the simulated mass transfer rate was in satisfactory agreements with that of experiments.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Chemical Engineering - Volume 23, Issue 2, February 2015, Pages 356–365