化学涂层通道毛细管填充中的前钉扎
Front pinning in capillary filling of chemically coated channels
摘要：
从理论和数值两方面研究了化学涂层非均匀边界条件下毛细管填充的动力学。特别地，通过将前运动方程映射到耗散驱动振子的动力学上，在涂层斑点稀疏的条件下，导出了前钉扎的解析判据。该标准进行了测试，对二维格子玻尔兹曼模拟，并发现提供令人满意的协议，只要前界面的宽度仍然比典型的异质性尺度的化学涂层薄得多。
英文摘要：
The dynamics of capillary filling in the presence of chemically coated heterogeneous boundaries is investigated, both theoretically and numerically. In particular, by mapping the equations of front motion onto the dynamics of a dissipative driven oscillator, an analytical criterion for front pinning is derived, under the condition of diluteness of the coating spots. The criterion is tested against two dimensional Lattice Boltzmann simulations, and found to provide satisfactory agreement as long as the width of the front interface remains much thinner than the typical heterogeneity scale of the chemical coating.
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