论文标题
轴对称流动模式不均匀接触线路断裂
Non-uniformly receding contact line breaks axisymmetric flow patterns
论文作者
论文摘要
当接触线不均匀退缩时，我们使用层析成像粒子图像测能（PIV）研究了蒸发液滴的内部流动模式。我们观察到三维方位角涡旋对，而触点线不均匀地退缩，并且在蒸发过程中保持对称性的流场。基于实验结果，我们表明内部流的涡度幅度与相对接触线运动有关。此外，为了解释如何创建方位角涡流对流，我们通过考虑接触线运动和蒸发通量之间的关系来开发理论模型。最后，我们表明理论模型与实验结果有很好的一致性。
We investigate the internal flow pattern of an evaporating droplet using tomographic particle image velocimetry (PIV) when the contact line non-uniformly recedes. We observe a three-dimensional azimuthal vortex pair while the contact line non-uniformly recedes and the symmetry-breaking flow field is maintained during the evaporation. Based on the experimental results, we show that the vorticity magnitude of the internal flow is related to the relative contact line motion. Furthermore, to explain how the azimuthal vortex pair flow is created, we develop a theoretical model by taking into account the relation between the contact line motion and evaporating flux. Finally, we show that the theoretical model has a good agreement with experimental results.
