微尺度沸腾的压力扰动模型

工程热物理学报 , 2000, 21(2): 191-195.

1.清华大学热能工程系,北京,100084

2.清华大学热能工程系,北京,100084

3.清华大学热能工程系,北京,100084

基金项目: 中国科学院资助项目(59625612)

PRESSURE PERTURBATION MODEL FOR MICROSCALE BOILING

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变行为,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.

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