2820 水中を上昇する気泡の界面状態に関する研究

概要

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The surface condition of a spherical gas bubble rising in water was investigated numerically. We numerically estimated drag coefficients and Sherwood number of the "Stagnant Cap Model" by directly solving the Navier-Stokes equation and the convection-diffusion equation. We compared the numerical results with the experimental results that we precisely estimated the drag coefficients and the Sherwood number for the dissolution of gas bubbles in the transient regime where the bubble changes from behaving as a fluid sphere to behaving as a solid particle by using the experimental system that use a CCD camera coupled with a microscope to track the rising bubble. The experimental and numerical results are in good agreement and clarified the mechanism of the transient process where the bubble behavior changes from that of a fluid sphere to that of a solid particle.
一般社団法人日本機械学会の論文
2000-07-31