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首页> 外文期刊>The European physical journal, E. Soft matter >Droplets on liquids and their journey into equilibrium
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Droplets on liquids and their journey into equilibrium

机译：液体上的液滴及其进入平衡的过程

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The morphological path of droplets on a liquid substrate towards equilibrium is investigated experimentally and theoretically. The droplets emerge in the late stage of a dewetting process of short chained polystyrene (PS) dewetting from liquid polymethyl-methacrylate (PMMA). The three-dimensional droplet profiles are obtained experimentally by combining the in situ imaged PS/air interface during equilibration and the ex situ imaged PS/PMMA interface after removal of the PS by a selective solvent. Numerically the transient drop shapes are calculated by solving the thin-film equation in lubrication approximation using the experimentally determined input parameter like viscosity, film thickness and surface tensions. The numerically obtained droplet morphologies and time scales agree very well with the experimental drop shapes. An unexpected observation is that droplets with identical volumes synchronise their motion and become independent of the initial geometry long time before equilibrium is reached. Graphical abstract: [Figure not available: see fulltext.]
机译：实验和理论上研究了液体基质上的液滴达到平衡的形态学路径。液滴出现在短链聚苯乙烯（PS）从液态聚甲基丙烯酸甲酯（PMMA）脱湿的后期。通过组合平衡过程中的原位成像PS /空气界面和选择性溶剂去除PS后的原位成像PS / PMMA界面，实验获得了三维液滴轮廓。在数值上，通过使用实验确定的输入参数（例如粘度，膜厚和表面张力）通过求解润滑近似中的薄膜方程来计算瞬态液滴形状。从数值上获得的液滴形态和时间尺度与实验液滴形状非常吻合。出乎意料的观察是，具有相同体积的液滴会在达到平衡之前很长时间内同步其运动并独立于初始几何形状。图形摘要：[该图不可用：请参见全文。]

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