ACTIVE NUCLEATION SITE DENSITY AND POOL BOILING HEAT-TRANSFER - AN EXPERIMENTAL-STUDY

被引：50

作者：

BARTHAU, G

机构：

[1] Institut für Thermodynamik und Wärmetechnik, Universität Stuttgart, D-7000 Stuttgart 80

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1992年 / 35卷 / 02期

关键词：

Flow of Fluids--Bubble Formation - Vapors--Condensation;

D O I：

10.1016/0017-9310(92)90266-U

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A novel optical method for measuring active nucleation site density is presented. The method has been used in pool boiling experiments with R114 on a horizontal tube and succeeded in measuring up to 5000 sites per cm2. Heat transfer contribution of an individual active site is found to decrease with increasing pressure and is found to decrease strongly with increasing heat flux. The concept of area of influence of a bubble is discussed for the horizontal tube. Latent heat transfer is found to be significant even at lower heat fluxes.

引用

页码：271 / 278

页数：8

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