Evaporation heat transfer of falling films on horizontal tube. Part 1: Analytical study
- Kyushu Univ., Kasuga, Fukuoka (Japan). Dept. of Energy and Mechanical Engineering
Evaporation heat transfer of a saturated falling film on a horizontal tube was studied analytically. For laminar flow, a model comprised of the developing, transitional, and developed regions is proposed. The boundary layer integral method was used to reach a closed-form solution. A third-order polynomial temperature profile was assumed in the developing region, and a linear profile in the developed region. Both profiles join smoothly in the transition region. From this analysis, the Nusselt number was presented as a function of film Reynolds number, Prandtl number, and dimensionless tube radius. A similar correlation was developed for turbulent flow using the eddy viscosity model, where the Nusselt number was obtained as a function of film Reynolds number and Prandtl number.
- OSTI ID:
- 276279
- Journal Information:
- Heat Transfer - Japanese Research, Journal Name: Heat Transfer - Japanese Research Journal Issue: 1 Vol. 24; ISSN 0096-0802; ISSN HTJPAU
- Country of Publication:
- United States
- Language:
- English
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