Experimental Study About Influences of Langmuir Circlation on Gas Transfer Beneath Air/Water Interface

Abstract

Langmuir circulation is a large-scale secondary current which is generated by wind-induced water waves, and it plays some important roles on turbulence production and the transports of mass and momentum. Previously, many researchers have conducted studies on Langmuir circulation and related hydrodynamic phenomena. However, most of them focused on only hydrodynamic characteristics, e.g., generating mechanism and velocity streaks, and thus we lack for reliable information of the relation between a gas transfer and the Langmuir circulation. The goal of the present study is to obtain the relationship between a gas transfer velocity and the aspect ratio of the laboratory flume. So, in order to suggest a new physical model, DO measurements were conducted for each aspect ratio condition.