Direct numerical simulation of carbon-dioxide gas absorption caused by turbulent free surface flow

✍ Scribed by Tomoaki Kunugi; Shin-ichi Satake; Yasuo Ose

• Book ID: 104289331
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 457 KB
• Volume: 22
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(01)00086-8

✦ Synopsis

The turbulent behavior of liquid and gas ¯ows 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 ¯ow with a shear wind has been carried out by means of a coupled gas±liquid ¯ow 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 ¯ow with carbon-dioxide gas transfer at the gas±water interface, the mean and root-mean-square distributions of velocity, pressure and concentration and their ¯uctuations throughout both the gas and liquid ¯ow ®elds are obtained and compared with the experimental data. Finally, an exchange coecient 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.