摘要
本文从团聚（ｃｌｕｓｔｅｒｉｎｇ）的分子动力学过程出发，研究微尺度沸腾相变的物理机制。通过分析沸腾系统势能变化趋势，指出核化阶段必然伴随团聚体积的增加，从而导致压力扰动的产生。在微尺度条件下，这种压力扰动将可能主导沸腾系统的相交行为，由此导出相变发生的临界尺度判据，在量级上与实验取得很好的一致。
Cluster theory, which is based on molecular dynamics was employed to investigate the boiling nucleation characteristics under microscale conditions. A new physical model, termed as 'Pressure Perturbation', was proposed to explain the extremely difficult nucleation phenomena in microchannels. A nucleation criterion was also derived to describe bubble formation in the microchannels. The results provide a clear physical nature for the hypothetical concepts 'Evaporating Space' and 'Fictitious Boiling'. The prediction is in reasonably good agreement with previous investigations.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2000年第2期191-195,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金!59625612
