In this article, the rising trajectories of oil droplets near the substrates of small channels in the laminar flow field were observed using a high-speed camera. Chemical modifications were made on the surfaces of the brass sheets to change the surface properties, and the controllable regulation of the superoleophilic-superoleophobic wettability gradient was achieved. The adhesion behaviors of the oil droplets on surfaces with different wettabilities at different flow velocities were observed as well. According to the adhesion behaviors of oil droplets on surfaces with different wettabilities, a mathematical model was established to analyze water film thinning and the adherence of oil droplets on the wall in the laminar flow field. Then the quantitative relationships among the adhesion times tf of oil droplets on different wetting surfaces, oil and water properties, and surface wettability were acquired.

中文翻译：

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层流场中具有不同润湿性的表面上油滴的迁移和粘附。

在本文中，使用高速相机观察了层流场中小通道基板附近油滴的上升轨迹。对黄铜板的表面进行化学改性以改变表面性质，并实现了对超亲油-超疏油性润湿性梯度的可控调节。还观察到了油滴在不同流速下具有不同润湿性的表面上的粘附行为。根据油滴在不同润湿性的表面上的附着行为，建立了数学模型来分析层流场中水膜的变薄和油滴在壁上的附着。然后在不同的润湿表面上油滴的附着时间tf之间的定量关系，