THE MOTION OF A SMALL BUBBLE IN WAVES

The motion of a single spherical small bubble due to buoyancy in the i deal fluid with waves is investigated theoretically and experimentally in this article. Assuming that the bubble has no effect on the wave f ield, equations of a bubble motion are obtained and solved. It is foun d that the nonlinear effect increases with the increase of the bubble radius and the rising time. The rising time and the motion orbit are g iven by calculations and experiments. When the radius of a bubble is s maller than 0.5mm and the distance from the free surface is greater th an the wave height, the results of the present theory are in close agr eement with measurements.