Effect of Contact Line Shape on Horizontal Shear Force of Water Droplet on Silicone Sheet

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  • シリコーンシート表面上の水滴の水平せん断力に及ぼす接触線形状の影響

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<p>A water droplet between two faces give rise to lateral force under shearing motion. It's known that contact line shape and contact angle hysteresis are affected to interface resistance of a water droplet on inclined plate. It isn't known that what affect to horizontal shear force of the water droplet between two faces. We measured horizontal shear force, contact line shape and contact angle of the water droplet between a glass ball and a silicone sheet. The contact line shape of water droplet changed from a circle to an ellipse because the length of contact line shape is increased. The contact angle hysteresis and horizontal shear force increased with lapse of time. A calculation value of horizontal shear force was found out using contact angle hysteresis, contact line shape and surface tension. The calculation value of horizontal shear force was in good agreement with experiment value of horizontal shear force. It was found length of contact line shape affect to horizontal shea force.</p>

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