The effect of heated wall thickness and materials on nucleate boiling at high heat flux
| Autor: | Chin Pan, Kuo-Tong Ma |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Materials science
Convective heat transfer Critical heat flux General Chemical Engineering Thermodynamics Heat transfer coefficient Condensed Matter Physics Thermal conduction Atomic and Molecular Physics and Optics Physics::Fluid Dynamics Heat flux Boiling Heat transfer Composite material Nucleate boiling |
| Zdroj: | International Communications in Heat and Mass Transfer. 26:1103-1114 |
| ISSN: | 0735-1933 |
| DOI: | 10.1016/s0735-1933(99)00101-3 |
| Popis: | The present work is to numerically investigate the effect of heater side factors on the nucleate boiling at high heat flux, which is characterized by the existence of macrolayer. Two-region equations are proposed to study both thermo-capillary driven flow in the liquid layer and heat conduction in the solid wall. The numerical results indicate that the thermo-capillary driven flow in the macrolayer and evaporation at the vapor-liquid interface constitute a very efficient heat transfer mechanism to explain the high heat transfer coefficient of nucleate boiling heat transfer near CHF. For a very thin wall and/or wall with a poor thermal conductivity (heat side factors) are found to have significant effect on flow pattern in the liquid layer and the temperature distribution in the heated wall. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect