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Creating bubbles in water under tension requires energy, dependent on the water's stress-strain behavior. Curvature-dependent surface tension is key for bubble stability, with analytical and simulation methods determining critical radii.

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Area of Science:

  • Thermodynamics
  • Materials Science
  • Computational Physics

Background:

  • Finite samples of water under tension can form voids (bubbles).
  • Understanding bubble formation and stability is crucial in various physical and chemical processes.

Purpose of the Study:

  • To determine the work (Helmholtz free energy change) required for bubble creation in water under tension.
  • To investigate the influence of stress-strain relationships and curvature-dependent surface tension on bubble stability.
  • To predict critical and stable bubble radii.

Main Methods:

  • Developed an analytical thermodynamic model for free energy change during bubble formation.
  • Performed molecular dynamics simulations using the TIP4P/2005 water model.
  • Utilized mean first-passage time calculations to determine critical bubble radii.

Main Results:

  • The work of bubble creation depends on the material's stress-strain relationship.
  • Curvature-dependent surface tension is essential for explaining bubble stability.
  • Combined analytical and simulation results allowed determination of surface tension parameters and bubble radii.

Conclusions:

  • The study provides a thermodynamic framework for understanding bubble nucleation in stressed water.
  • Accurate prediction of bubble radii requires considering curvature-dependent surface tension.
  • The findings are validated by both theoretical calculations and molecular simulations.