Abstract
Recently electronic devices have high energy density because of the miniaturization and being highly powered. We need to develop a cooling system with boiling that has high heat transfer coefficient at micro- or nano-scale. However, no one studied growth mechanism of tiny bubbles at high temperature in spite that understanding of boiling phenomenon in nano-scale is important. In this study, we simulated generation and growth of those tiny bubbles at a high temperature using molecular dynamics simulation. Then we estimated the time development of the characteristic length (growth exponent) of bubbles using static structure factor. Consequently, we found that there are few spherical bubbles under high temperature while many voids were observed due to the high kinetic energy, and the growth exponent for the characteristic length was estimated to be around 0.5. Also, we conducted a semi-theoretical analysis and could successfully derive the growth exponent of 0.5 based on a simple evaporation/condensation model.
