気泡/液滴形状の解析による表面張力と接触角の決定(反応・多相系非ニュートン,一般講演)

概要

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A prediction of surface tension and contact angle for Newtonian and non-Newtonian fluids by measuring either shape of a small droplet on a solid surface or shape of a small bubble attached to a solid surface in desired liquid is presented. A bubble shape can be calculated theoretically under stable condition from the point of view of the momentum balance and force balance along the interface for a given physical properties and conditions such as surface tension, density and gravity. Optimizing of three non-dimensional parameters (the Bond number, a ratio of height to contact radius: b/a, and a shift factor to adjust the origin point) for the numerical analysis is carried out until the experimental interface shape coincides well with the numerical results within a given tolerance. It was found that obtained surface tension and contact angles are in good agreement with the literatures.
日本流体力学会の論文
2009-09-02