Thermal Sciences 2004. Proceedings of the ASME - ZSIS International Thermal Science Seminar II
DOI: 10.1615/ICHMT.2004.IntThermSciSemin
ISBN Print: 978-9-61913-930-1
An Improved Form for Natural Convection Heat Transfer Correlations
pages 275-279
DOI: 10.1615/ICHMT.2004.IntThermSciSemin.290
RÉSUMÉ
Natural convection heat transfer correlations are usually in the form Nusselt{Rayleigh}, and occasionally in the form Nusselt{Rayleigh*}. Both forms are inconvenient because they oftentimes require indirect solution:
- When Nusselt{Rayleigh} correlations are used to calculate heat flux, solution is simple and direct. But when they are used to calculate boundary layer temperature difference, solution must be indirecti.e. must be based on an indirect method such as iteration or trial-and-error.
- When Nusselt{Rayleigh*} correlations are used to calculate boundary layer temperature difference, solution is direct. But when they are used to calculate heat flux, solution must be indirect.
Included in this manuscript are graphical and analytical correlations in the improved form obtained by transforming Nu{Ra} correlations from the literature.