标题： 用粘塑性流体图案化表面纹理板 显示英文标题

标题： Patterning surface textured plates with a viscoplastic fluid

摘要： 将粘塑性流体沉积到基板上可以通过简单地将最初由充满流体的间隙分隔的两块板分开来实现，其中足迹形状取决于指状不稳定性的发展。 在这里，我们提出另一种方法，通过设计固体基板的宏观结构来实现粘塑性流体的可控沉积。 通过在提升的Hele-Shaw细胞中的实验，我们探讨了槽形、方形、金字塔形和三角形图案如何影响液体沉积的动力学。 这些基板结构直接控制粘塑性流体足迹的最终形状。 结果表明，这些基板图案对作用在板上的正常粘附力影响很小。 显示英文摘要

摘要： The deposition of a viscoplastic fluid onto a substrate can be achieved by simply moving apart two plates initially separated by a fluid filled gap, where the footprint shape depends on the initiation of a fingering instability. Here, we present another approach for the controlled deposition of a viscoplastic fluid by designing the macroscopic structures of the solid substrate. Through experiments in a lifted Hele-Shaw cell, we explore how slot, square, pyramid, and triangle-shaped patterns affect the dynamics of liquid deposition. These substrate structures directly control the final shape of the viscoplastic fluid footprint. It turns out that these substrate patterns have little influence on the normal adhesive force acting on the plates.