Direct numerical simulation of carbon-dioxide gas absorption caused by turbulent free surface flow
Direct numerical simulation of carbon-dioxide gas absorption caused by turbulent free surface flow
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DOI：
10.1016/s0142-727x(01)00086-8
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发表时间：
2001-06-01
影响因子：
2.6
通讯作者：
Ose, Y
中科院分区：
文献类型：
--
作者：
Kunugi, T;Satake, S;Ose, Y
与固体边界处的运动相比，自由表面处液体和气体流动的湍流行为还没有得到很好的理解。本文采用气液耦合流动求解方法，对有切变风的湍流自由表面进行了数值模拟，多界面和平流和重建求解器（MARS）开发的作者之一。亨利定律被应用于由二氧化碳气体吸收引起的自由表面处的饱和气体浓度的评估。本文对含CO_2气体的气-水界面自由表面湍流进行了数值模拟，得到了气-液两相流场中速度、压力和浓度的平均分布和均方根分布及其脉动，并与实验数据进行了比较。最后，在本研究中估计的二氧化碳气体在湍流自由表面的交换系数与现有的实验和海上测量数据吻合得很好。(C)2001 Elsevier Science Inc. All rights reserved.
The turbulent behavior of liquid and gas flows at a free surface is not very well understood in comparison with that of the motions at the solid boundary. In the present study, the DNS for the turbulent free surface how with a shear wind has been carried out by means of a coupled gas-liquid flow solution procedure, i.e., multi-interface and advection and reconstruction solver (MARS) developed by one of the authors. Henry's law is applied to the evaluation of a saturated gas concentration at the free surface caused by the carbon-dioxide gas absorption. Resulting from the present DNS of turbulent free surface flow with carbon-dioxide gas transfer at the gas-water interface, the mean and root-mean-square distributions of velocity, pressure and concentration and their fluctuations throughout both the gas and liquid Row fields are obtained and compared with the experimental data. Finally, an exchange coefficient of carbon-dioxide gas at the turbulent free surface estimated in this study is in good agreement with the existing experimental and sea-measurement data. (C) 2001 Elsevier Science Inc. All rights reserved.