Abstract
The present study employs equilibrium molecular dynamics simulation based on the Green-Kubo approach to investigate the thermal conductivity of liquid water at the nanoscale. Specifically, the discussion centers around the influence of the size and surface wettability of two-dimensional nanochannels on the confined water thermal conductivity. The simulation results reveal a significant impact of nanochannel size on the thermal conductivity of confined water, with a decrease in channel spacing leading to a reduction in thermal conductivity below its bulk value. However, the thermal conductivity of water confined within a surface is not influenced by the water surface wettability. Additionally, the study investigates the influence of water thermal conductivity on droplet formation. The results indicate that incorporating changes in droplet thermal conductivity during the nucleation process can partially address the issue of overestimating the heat transfer coefficient for dropwise condensation.
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