| Autor: |
Novak Zuber |
| Rok vydání: |
1961 |
| Předmět: |
|
| Zdroj: |
International Journal of Heat and Mass Transfer. 2:83-98 |
| ISSN: |
0017-9310 |
| DOI: |
10.1016/0017-9310(61)90016-3 |
| Popis: |
The physical principles governing bubble growth in a superheated liquid were originally formulated by Bosnjakovic and Jakob. Using these principles, Fritz and Ende derived an approximate formula for the growth of a bubble in a uniformly superheated liquid. It is shown below that the energy considerations in the Bosnjakovic-Jakob analysis enable one to calculate also the approximate rate of growth of a bubble on a heated surface in a liquid at saturation. One need only take into account the heat flux from the heated surface to the liquid. One can improve the agreement with experimental data by making corrections which have already been applied by other authors to bubbles in a uniformly superheated liquid. Experimental data for bubbles growing and collapsing in subcooled boiling can be approximated similarly by considering the growth and collapse process separately. The growth rate is given by the extended Bosnjakovic-Jakob analysis described above. As shown by Bankoff and Mikesell, the collapse rate can be predicted by the solution of Rayleigh's equation for an isothermal process. The growth and collapse process can be combined by matching them at the maximum bubble radius, thus giving a complete picture of the life history of bubbles formed in subcooled boiling. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
