Boundary vorticity method for laminar forced convection heat transfer in curved pipes
| Autor: | K. C. Cheng, Akiyama Mitsunobu |
|---|---|
| Rok vydání: | 1971 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Convective heat transfer Mechanical Engineering Prandtl number Film temperature Laminar flow Mechanics Heat transfer coefficient Condensed Matter Physics Forced convection Physics::Fluid Dynamics symbols.namesake Classical mechanics Heat flux Heat transfer symbols |
| Zdroj: | International Journal of Heat and Mass Transfer. 14:1659-1675 |
| ISSN: | 0017-9310 |
| DOI: | 10.1016/0017-9310(71)90075-5 |
| Popis: | A finite-difference solution using a combination of line iterative method and boundary vorticity method is presented for the hydrodynamically and thermally fully developed laminar forced convection in curved pipes subjected to the thermal boundary conditions of axially uniform wall heat flux and peripherally uniform wall temperature at any axial position. The numerical solution converges up to a reasonably high Dean number where the asymptotic behavior for the flow and heat transfer results already appears. The Prandtl number effect on heat transfer result is clarified for the first time, and it is shown that all the heat transfer results for Pr ⩾ 1.0 can be correlated by a single curve using a new parameter ( K 2 Pr ) with reasonable accuracy. The numerical results from the present analysis are compared with the experimental and theoretical results available in the literature. The perturbation method is clearly shown to be invalid, and certain deficiency of the boundary-layer approximation method is pointed out. |
| Databáze: | OpenAIRE |
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