Correlating equations for laminar and turbulent free convection from a horizontal cylinder
Abstract
A simple empirical expression for the mean value of Nu over the cylinder for all Ra and all Pr is developed in terms of the model of Churchill and Usagi. This expression is applicable for uniform heating as well as for uniform wall temperature and for mass transfer and simultaneous heat and mass transfer. Even simpler expressions are obtained for restricted conditions. These expressions improve upon prior graphical and empirical correlations in both accuracy and convenience.
- Publication:
-
International Journal of Heat and Mass Transfer
- Pub Date:
- September 1975
- DOI:
- 10.1016/0017-9310(75)90222-7
- Bibcode:
- 1975IJHMT..18.1049C
- Keywords:
-
- Boundary Layer Transition;
- Convective Heat Transfer;
- Cylindrical Bodies;
- Free Convection;
- Laminar Heat Transfer;
- Turbulent Heat Transfer;
- Mass Transfer;
- Temperature Gradients;
- Wall Temperature;
- Fluid Mechanics and Heat Transfer