Computational approach for investigating nanoscale interfacial ice adhesion trends

Area of Science:

• Materials Science
• Computational Physics
• Surface Chemistry

Background:

• Understanding ice-substrate adhesion is crucial for effective ice protection systems.
• Macroscopic experiments have limitations in detailing microscale ice adhesion mechanisms.
• Investigating nanoscale interactions provides deeper insights into ice behavior.

Purpose of the Study:

• To apply molecular dynamics simulations to model ice adhesion on metallic substrates.
• To determine nanoscale tensile and shear ice adhesion strengths.
• To compare nanoscale simulation results with macroscale experimental trends.

Main Methods:

• Utilized a coarse-grained model of water to nucleate ice.
• Employed steered molecular dynamics (SMD) for tensile and shear adhesion tests.
• Simulated ice adhesion on various face-centered cubic (FCC) surface morphologies.

Main Results:

• Obtained nanoscale tensile and shear adhesion strengths for ice on different substrates.
• Observed that contact area and temperature variations show similar trends to macroscopic data.
• Identified discrepancies in tensile and shear loading rate effects between nanoscale and macroscale.

Conclusions:

• Molecular dynamics provides valuable insights into ice-substrate adhesion at the microscale.
• Nanoscale simulations highlight complexities not evident in macroscopic ice adhesion studies.
• Findings can inform the development of advanced, low-energy ice protection systems.