移動壁面上を浮遊する液滴下の空気薄膜内流れ

抄録

A droplet can steadily levitate over a moving wall owing to an air film under the droplet. Previous study obtained no quantitative agreement between the numerical and experimental film shape due to difference of dimensions. In this study, we experimentally investigate the flow field inside the air film. First, we calculate lubrication pressure generated inside the air film and then verify a local balance with surface tension and hydrostatic pressure. Second, we calculate two-dimensional flow field although previous study has assumed onedimensional flow field. Consequently, we experimentally confirm that the measured film thickness is lower than the numerical film thickness because some of the air escapes to spanwise direction.