| Autor: |
Negro, Giuseppe, Gonnella, Giuseppe, Lamura, Antonio, Busuioc, Sergiu, Sofonea, Victor |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. E 109, 015305 2024 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevE.109.015305 |
| Popis: |
The liquid-vapor phase separation is investigated via lattice Boltzmann simulations in three dimensions. After expressing length and time scales in reduced physical units, we combined data from several large simulations (on $512^3$ nodes), with different values of viscosity, surface tension and temperature, to obtain a single curve of rescaled length $\hat{l}$ as a function of rescaled time $\hat{t}$. We find evidence of the existence of kinetic and inertial regimes with growth exponents $\alpha_d=1/2$ and $\alpha_i=2/3$ over several time decades, with a crossover from $\alpha_d$ to $\alpha_i$ at $\hat{t} \simeq 1$. This allows us to rule out the existence of a viscous regime with $\alpha_v=1$ in three-dimensional liquid-vapor isothermal phase separation, differently from what happens in binary fluid mixtures. An in-depth analysis of the kinetics of the phase separation process, as well as a characterization of the morphology and the flow properties, are further presented in order to provide clues into the dynamics of the phase-separation process. |
| Databáze: |
arXiv |
| Externí odkaz: |
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