Experimental heat transfer studies for water in an annulus at low Reynolds number
Heat transfer data was collected and correlated for fully developed natural laminar flow and combined natural and forced laminar flow of water in a vetrical annulus for 140 < Re < 1200, and Ra up to 1.7 x 10/sup 6/. For Ra < 5 x 10/sup 5/, the vaules of the Nu were independent of Ra; beyond that the variation in Nu was correlated as Nu ..cap alpha.. Ra/sup0.25/. Data was also collected and correlated for bouyancy assisting as well as buoyancy opposing laminar and transition flows for 140 < Re < 10,000. For 1000 < Re < 4000, the values of Nu for buoyancy opposing flow were about 25 percent lower than those for buoyancy assisting flow. For laminar flow (Re < 500), Nu values were consistent for both natural and forced circulation.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); New Mexico Univ., Albuquerque (USA). Dept. of Chemical and Nuclear Engineering
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5206953
- Report Number(s):
- SAND-85-2049C; CONF-850810-30; ON: DE86000425
- Resource Relation:
- Conference: National heat transfer conference, Denver, CO, USA, 4 Aug 1985; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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