| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
|
|---|
| Outline of Final Research Achievements |
We have studied Ostwald ripening of bubbles by molecular dynamics simulations involving billions of particles. The scaling exponents were estimated from the bubble-size distribution function and the values of them were successfully described by the classical theory of Ostwald ripening, the Lifshitz-Slyozov-Wagner (LSW) theory. This is the first direct confirmation of LSW theory in bubble nuclei. As temperature increases, the crossover of the scaling exponent is observed. This crossover implies that the growth of bubbles changes from interface-limited to diffusion-limited. We also observed the growth rate of the bubbles (the kinetic term) directly for the first time. While the kinetic term is well described by the theory in the scaling region, it has broad distribution in early stage. This behavior shows that the inhomogeneity of the pressure in the system and the inhomogeneity is the reason why the classical theory fails to describe the early stage of the bubble nucleation.
|
