1604 振動場における微小液滴形状の解析による表面張力の測定(OS16-1 非ニュートン流体の流動現象,オーガナイズドセッション)

概要

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We observed droplets placed on a vertically vibrating flat and smooth horizontal plate using a microscope and a high speed video camera and determined surface tensions and contact angles by comparing theoretical analysis. Assuming a droplet in its lowest place is instantaneously static, the shape of the droplet can be calculated theoretically from the point of view of the force balance along the interface for a given physical properties and conditions such as surface tension, density and apparent 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 agrees well with the numerical results within a given tolerance. It was found that obtained dynamic surface tensions are influenced by the vibration frequency.
一般社団法人日本機械学会の論文
2010-10-29