Bubble Nucleation and Heat Transfer on Three-Dimensional Mixed-Wettable Nanostructured Surfaces: A Molecular Dynamics...

Area of Science:

• Materials Science
• Thermodynamics
• Computational Physics

Background:

• Bubble nucleation and heat transfer are critical in phase change processes.
• Controlling these phenomena on engineered surfaces is key for thermal management applications.

Purpose of the Study:

• To investigate bubble nucleation and heat transfer on nanostructured surfaces with mixed wettability.
• To understand how varying pillar wettability influences bubble formation and growth dynamics.

Main Methods:

• Molecular dynamics simulations were employed to study argon bubble behavior.
• Five distinct surfaces were designed by systematically altering central pillar wettability while maintaining hydrophilic lateral pillars.

Main Results:

• Bubble nucleation sites and patterns were significantly influenced by pillar wettability and nanostructure.
• Hydrophobic central pillars promoted nucleation within pillar regions and altered bubble growth.
• Changes in wettability affected argon density, potential energy, and heat flux.

Conclusions:

• Mixed wettability on nanostructured surfaces offers a method to control bubble dynamics.
• Engineered surfaces can be optimized for enhanced heat transfer performance in phase change and thermal management systems.