Validation of Simulation and Mass Transfer Coefficient Prediction with Interfacial Convection
Validation of Simulation and Mass Transfer Coefficient Prediction with Interfacial Convection
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DOI：
10.1002/ceat.201600553
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发表时间：
2017-06
影响因子：
2.1
通讯作者：
Botong Liu;Botan Liu;Xiaolong Ge;Xigang Yuan
中科院分区：
文献类型：
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作者：
Botong Liu;Botan Liu;Xiaolong Ge;Xigang Yuan
用数值模拟方法研究界面传质是一个很有前途的研究领域。本文采用基于晶格玻尔兹曼方法的随机扰动模型对co2 -乙醇吸收过程的瑞利对流进行了模拟，并将模拟结果与纹影观测结果进行了对比验证。结果表明，模拟方法能较好地捕捉吸收过程的特性。提出了基于雷诺数质量通量、标量波动方差及其耗散率的关联预测传质系数，发现该关联在相位差方面优于现有方法。在此关联中，首次将传质系数与计算传质联系起来。
Investigation of interfacial mass transfer by means of numerical simulation is a promising field. In the present work, the Rayleigh convection of the CO2-ethanol absorption process was simulated using a random-disturbance model based on the lattice Boltzmann method and the results were compared with the Schlieren observation for validation. It was found that the simulation method was superior for capturing the characteristics of the absorption process. A correlation was then proposed to predict the mass transfer coefficient based on Reynolds mass flux, scalar fluctuation variance, and its dissipation rate, and the correlation was found to be superior to existing methods in terms of phase difference. In this correlation, the mass transfer coefficient was linked with computational mass transfer for the first time.