Thermal–hydraulic characteristics of single-phase flow in capillary pipes
The objective of the present paper is to provide a general overview of the research carried out so far in single-phase heat transfer and flow in capillary (micro) pipes. Laminar flow and laminar-to-turbulent flow transition are analyzed in detail in order to clarify the discrepancies among the resul...
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| Veröffentlicht in: | Experimental thermal and fluid science 2004, Vol.28 (2), p.87-95 |
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| creator | Celata, G.P. Cumo, M. Zummo, G. |
| description | The objective of the present paper is to provide a general overview of the research carried out so far in single-phase heat transfer and flow in capillary (micro) pipes. Laminar flow and laminar-to-turbulent flow transition are analyzed in detail in order to clarify the discrepancies among the results obtained by different researchers. Experiments performed in the ENEA laboratory indicate that in laminar flow regime the friction factor is in good agreement with the Hagen–Poiseuille theory for Reynolds number below 600–800. For higher values of Reynolds number, experimental data depart from the Hagen–Poiseuille law to the side of higher
f values. The transition from laminar to turbulent regime occurs for Reynolds number in the range 1800–2500. Diabatic experiments show that heat transfer correlations in laminar and turbulent regimes, developed for conventional tubes, are not properly adequate for heat transfer coefficient prediction in microtubes. |
| doi_str_mv | 10.1016/S0894-1777(03)00026-8 |
| format | Article |
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| ispartof | Experimental thermal and fluid science, 2004, Vol.28 (2), p.87-95 |
| issn | 0894-1777 1879-2286 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Applied fluid mechanics Exact sciences and technology Fluid dynamics Fluidics Fundamental areas of phenomenology (including applications) Physics Transition to turbulence Turbulent flows, convection, and heat transfer |
| title | Thermal–hydraulic characteristics of single-phase flow in capillary pipes |
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