检索结果-南通市图书馆

Investigation of mass transfer model of CO_(2) absorption with rayleigh convection using multi-relaxation time lattice Boltzmann method

引用

Chinese Journal of Chemical Engineering 2022年第10期50卷 130-142页

作者： Longyun Zheng Kai Guo Hongwei Cai Bo Zhang Hui Liu Chunjiang Liu School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China State Key Laboratory of Chemical Engineering Tianjin UniversityTianjin 300072Chin

CO_(2) absorption into absorbents is a widely used method to reduce carbon emissions,in which the concentration gradient near the gas-liquid interface may induce rayleigh convection(RC).Once RC occurs,the mass transfer rate will be significantly ***,it is necessary to explore the mass transfer enhancement mechanism further and develop a penetration/surface divergence hybrid mass transfer *** this study,we conduct research on the process of CO_(2) absorption into ethanol with ***,we use a multi-relaxation time lattice Boltzmann method to simulate the absorption process and obtain the flow and concentration *** we also verify the reliability of the numerical simulation results by comparing with the experimental ***,we analyze the characteristics of non-uniform flow and concentration fields in ***,we divide the near-interface region into diffusion-dominated and convection-dominated mass transfer zones by checking whether the horizontal average velocity is greater than 1.0×10^(-4) m·s^(-1).Furthermore,based on the differences in mass transfer mechanisms of the aforementioned two zones,we propose a penetration/surface divergence hybrid model to predict the instantaneous mass transfer *** prediction results demonstrate that the hybrid model can precisely predict the instantaneous mass transfer coefficient of the entire CO_(2) absorption *** proposed hybrid model provides a promising way to deal with the complex mass transfer problems with non-uniform flow and concentration fields.

关键词： Carbon dioxide Absorption rayleigh convection Numerical simulation multiple-relaxation-time orgeneralized lattice Boltzmannmodel(MRT-LBM) Mass transfer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characterization of rayleigh convection in Interfacial Mass Transfer by Lattice Boltzmann Simulation and Experimental Verification

引用

Chinese Journal of Chemical Engineering 2011年第5期19卷 845-854页

作者：付博袁希钢刘伯潭陈淑勇张会书曾爱武余国琮 State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

Concentration gradient induced rayleigh convection can influence effectively interracial mass transfer processes, but the convection phenomena are known as mesoscopic and complex. In order to investigate this phenomenon, a two-equation Lattice Boltzmann Method （LBM） is proposed to simulate the velocity and the concentra-tion distributions of rayleigh convection generated in the CO2 absorptlon into ethanol *** simulated results on velocity distributions are experimentally verified by PIV （particle image velocimetry technique） measurements. In order to simplify the analysis, the convection in the simulation as well as in the experiment, the rayleigh convection was manipulated into a single down flow pattern, The simulated results show that the concentration contours agree qualitatively with the schlieren images in the literature. The experimental and simulated results show that therayleigh convection under investigation is dominated by the flow in the downward direction and impels exchange of the liquid between the interfacial vicinity and the liquid bulk promoting the renewal of interfacial liquid, and hence enhances mass transfer. The comparison between the simulated and experimental results demonstrated that the proposed LBM is a promising alternative for simulating mass transfer induced rayleigh convection.

关键词： rayleigh convection lattice Boltzmann method particle image velocimetry interracial mass transfer instantaneous mass flux

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：