Nucleation and Growth of Liquid Droplets and Solid Clusters in Vapor Background
Subir K. Das (JNCASR, Bangalore)
| Quand ? |
Le 22/05/2017, de 11:00 à 12:00 |
|---|---|
| Où ? | Amphi. Schrödinger |
| Participants |
Subir K. Das |
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Abstract: In this talk I will primarily present results for kinetics of vapor-solid transitions (the solid phase having only quasi-long-range order) from molecular dynamics simulations of a single component Lennard-Jones system in space dimension d=2. Having been quenched from high temperature to the vapor-solid coexistence region, the system evolves via formation and growth of disconnected fractal domains of the solid phase, in the vapor background. For very low overall density, these fractal objects exhibit ballistic motion and grow via sticky collisions, the average mass following power-law with time. The exponent of the power-law growth varies continuously with the change in temperature, due to change in fractality. These molecular dynamics simulation results are in nice agreement with the outcome of a nonequilibrium kinetic theory. Comparison of the structure and dynamics in the above mentioned case will be made with those for vapor-liquid transition.