Active nucleation site density in boiling systems
Active nucleation site density in boiling systems
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DOI：
10.1016/s0017-9310(03)00031-0
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发表时间：
2003-07-01
影响因子：
5.2
通讯作者：
Ishii, M
中科院分区：
文献类型：
--
作者：
Hibiki, T;Ishii, M
实现的意义的活性成核位点密度作为一个重要的参数，用于预测的界面面积浓度在一个双流体模型配方，活性成核位点密度已被建模的知识，实际上是存在于表面上的空腔的大小和锥角分布的机械。新开发的模型已被各种池沸腾和对流沸腾系统中的活性核化点密度的数据进行了验证。新开发的模型清楚地表明，活性成核位密度是临界腔尺寸和接触角的函数，该模型可以解释各种研究者报道的活性成核位密度对壁厚的依赖性。新发展的模型可以在相当宽的流动条件范围内给出相当好的预测（0 kg/m（2）s ≤质量流速≤ 886 kg/m（2）s; 0.101 MPa ≤压力≤ 19.8 MPa：5 ° ≤接触角≤ 90 °;小于或等于1.00 × 10（4）个位点/m（2）的活性成核位点密度小于或等于1.51 × 10（10）个位点/m（2））。(C)2003爱思唯尔科技有限公司版权所有。
Realizing the significance of the active nucleation site density as an important parameter for predicting the interfacial area concentration in a two-fluid model formulation, the active nucleation site density has been modeled mechanistically by knowledge of the size and cone angle distributions of cavities that are actually present on the surface. The newly developed model has been validated by various active nucleation site density data taken in pool boiling and convective flow boiling systems. The newly developed model clearly shows that the active nucleation site density is a function of the critical cavity size and the contact angle, and the model can explain the dependence of the active nucleation site density on the wall superheat reported by various investigators. The newly developed model can give fairly good predictions over rather wide range of the flow conditions (0 kg/m(2) s less than or equal to mass velocity less than or equal to 886 kg/m(2) s; 0.101 MPa less than or equal to pressure less than or equal to 19.8 MPa: 5degrees less than or equal to contact angle less than or equal to 90degrees; 1.00 x 10(4) sites/m(2) less than or equal to active nucleation site density less than or equal to 1.51 x 10(10) sites/m(2)). (C) 2003 Elsevier Science Ltd. All rights reserved.