Characteristics of friction factor of gas flowing through small rectangular ducts

Low temperature (80–150K) nitrogen gas flow in rectangular ducts with very small aspect ratio (0.013–0.0475) was investigated experimentally. Potential applications for such channels include cooling of high T c superconductors, electronic circuits, ultra-small heat exchangers and reactors for modifi...

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Veröffentlicht in:	Cryogenics (Guildford) 1998-09, Vol.38 (9), p.869-873
1. Verfasser:	Mo, H.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Cells Chemical reactors Cooling cooling of high Tc superconductors Electric connection. Cables. Wiring Electrical engineering. Electrical power engineering Energy Energy. Thermal use of fuels Exact sciences and technology Flow of fluids Friction Heat exchangers High temperature superconductors Networks (circuits) Nitrogen nitrogen gas rectangular ducts Refrigerants Refrigerating engineering Refrigerating engineering. Cryogenics. Food conservation Separation Various equipment and components
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Beschreibung
Zusammenfassung:	Low temperature (80–150K) nitrogen gas flow in rectangular ducts with very small aspect ratio (0.013–0.0475) was investigated experimentally. Potential applications for such channels include cooling of high T c superconductors, electronic circuits, ultra-small heat exchangers and reactors for modification and separation of biological cells. A sequence of experiments had been carried out to determine the friction law which governs gas flow in small rectangular duct. The experimental friction factors were greater than the predictions for large flow ducts and approached the predictions for micro flow ducts.
ISSN:	0011-2275 1879-2235
DOI:	10.1016/S0011-2275(98)00078-2