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Nucleate Boiling of Thin Liquid Films on Nanostructured Surfaces with Hybrid Wettability Using Molecular Dynamics Simulation by Longyan Zhang; Jinliang Xu is a Chemical Engineering article available to read on EtoBox.

What is Nucleate Boiling of Thin Liquid Films on Nanostructured Surfaces with Hybrid Wettability Using Molecular Dynamics Simulation about?

The development in nanotechnology and bionics has increased the application of hybrid wettable nanostructured surfaces in engineering and science research. This study employed molecular dynamics to investigate the phase changes of thin liquid films on nanostructured surfaces with hybrid wettability. The liquid film and nanostructured surfaces were consisted of Lennard–Jones (LJ) fluid and LJ solid atoms, respectively. The simulation results indicate that the microscopic mechanism of nucleate boiling is facilitated by the original residual vapor nuclei. Additionally, the competition mechanism between the hybrid surface wettability and nanostructure is identified. The initial nucleation temperature for a solid wall with a hydrophobic nanocavity is 1.09ε/k B, which is 0.04ε/k B less than that for a hydrophilic nanocavity. This phenomenon can be attributed to the original residual vapor nuclei generated by hydrophobic nanocavities, which induce a piston-like effect at the vapor–liquid interface. As the nanocavity hydrophobicity increases, the piston-like effect increases the internal vapor pressure within the cavity and reduces the initial waiting time for bubble nucleation. For the hy

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Author

Longyan Zhang; Jinliang Xu

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Chemical Engineering (Physical Sciences)