We Use Non-Equilibrium Molecular Dynamics Simulations to Study the Heat Transfer Around Intensely Heated Solid Nanoparticles Immersed in a Model Lennard-Jones Fluid. We Focus Our Studies on the Role of the Nanoparticle Curvature on the Liquid Phase Stability under Steady-State Heating. for Small Nanoparticles We Observe a Stable Liquid Phase Near the Nanoparticle Surface, Which Can Be at a Temperature Well above the Boiling Point. Furthermore, for Particles with Radius Smaller Than a Critical Radius of 2 Nm We Do Not Observe Formation of Vapor Even above the Critical Temperature. Instead, We Report the Existence of a Stable Fluid Region with a Density Much Larger Than that of the Vapor Phase. We Explain the Stability in Terms of the Laplace Pressure Associated with the Formation of a Vapor Nanocavity and the Associated Effect on the Gibbs Free Energy. © 2014 AIP Publishing LLC.
K. Sasikumar et al., "Curvature Induced Phase Stability of an Intensely Heated Liquid," Journal of Chemical Physics, vol. 140, no. 23, article no. 234506, American Institute of Physics, Jun 2014.
The definitive version is available at https://doi.org/10.1063/1.4883516
Mechanical and Aerospace Engineering
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21 Jun 2014
Directorate for Engineering, Grant 1033354