Predrying transition on a hydrophobic surface : Statics and dynamics
Predrying transition on a hydrophobic surface : Statics and dynamics
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疏水表面上的预干燥转变：静力学和动力学
DOI：
10.1103/physreve.84.041602
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发表时间：
2011
影响因子：
2.4
通讯作者：
Akira Onuki(小貫明)
中科院分区：
文献类型：
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作者：
Ryohei Teshigawara (勅使河原良平);Akira Onuki(小貫明)
对于单组分流体，我们研究了在排斥流体的壁上的液体中薄层和厚层低密度层之间的预干燥相变。这是水的疏水壁。预干燥线从共存曲线开始，在相图的表面临界点处结束。我们用范德华模型数值计算这条线，用自由能展开到四次阶进行解析。我们还研究了在异质壁上疏水点上创建的层的预干燥动力学。在解压时从薄层到厚层，在压缩时从厚层到薄层。在过渡时，由于潜热对流，膜上方的液体区域冷却减压并加热压缩，并且从小压力脉冲从膜发射到液体中。
For one-component fluids, we examine the predrying phase transition between a thin and thick low-density layer in liquid on a wall repelling the fluid. This is the case of a hydrophobic wall for water. A predrying line starts from the coexistence curve and ends at a surface critical point in the phase diagram. We calculate this line numerically using the van der Waals model and analytically using the free-energy expansion up to the quartic order. We also examine the predrying dynamics of a layer created on a hydrophobic spot on a heterogeneous wall. It is from a thin to thick layer during decompression and from a thick to thin layer during compression. Upon the transition, a liquid region above the film is cooled for decompression and heated for compression due to latent heat convection, and a small pressure pulse is emitted from the film into the liquid.