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Mixed-Convection Laminar Film Condensation on an Inclined Elliptical Tube
- Source :
- Journal of Heat Transfer. 123:294-300
- Publication Year :
- 2000
- Publisher :
- ASME International, 2000.
-
Abstract
- The present theoretical study concerns with mixed-convection laminar film condensation outside an inclined elliptical tube with isothermal surface. The assumptions used are as in the classical Nusselt-Rohsenow theory, however, with considering the interfacial vapor shear by extending a circular-tube shear model developed in a previous study. An equivalent diameter, based on equal surface area, is introduced in the analysis to enable comparison with circular tubes. For zero ellipticity, the approach simplifies to the circular tube model developed in our previous work. A numerical solution has been obtained for a wide range of the independent parameters. The results indicate that the heat transfer performance of the inclined elliptical tube enhances with the increase of tube ellipticity compared to an inclined circular tube of equivalent diameter. For forced-convection-dominated film condensation, the rate of this enhancement in the heat transfer coefficient is found smaller than that for pure-free-convection film.
- Subjects :
- Convection
Materials science
Mechanical Engineering
Thermodynamics
Laminar flow
Mechanics
Heat transfer coefficient
Condensed Matter Physics
Forced convection
Physics::Fluid Dynamics
Mechanics of Materials
Combined forced and natural convection
Heat transfer
General Materials Science
Hydraulic diameter
Tube (fluid conveyance)
Subjects
Details
- ISSN :
- 15288943 and 00221481
- Volume :
- 123
- Database :
- OpenAIRE
- Journal :
- Journal of Heat Transfer
- Accession number :
- edsair.doi...........bc7226eb74d569cd5653630f809f70fd