TY - JOUR
T1 - Free convective heat transfer in tilted longitudinal open cavity
AU - Chang, S. W.
AU - Chiou, S. F.
AU - Su, L. M.
AU - Yang, T. L.
N1 - Funding Information:
We gratefully acknowledge the DFG (Deutsche Forschungsgemeinschaft) for their financial support in the priority program SPP 1141 Mischung.
PY - 2005/12
Y1 - 2005/12
N2 - Heat transfer experiments were performed to investigate the effects of inclination and channel height-to-gap ratio on free convection in a simulated fin-passage with a strategic aim of devising a criterion for selecting the optimal fin length that could provide the maximum free convective capability. The ranges of parameters investigated include the Grashof number, up to 500, 000; channel height-to-gap ratios of 1, 2, and 3; and tilt angles of 0°, 30°, 60°, 90°, 120°, 150°, and 180°. Selections of local and spatially averaged Nusselt number results demonstrate the manner by which the Grashof number, tilt angle, and channel height-to-gap ratio interactively affect the heat transfer. In conformity with the experimentally revealed heat transfer physics, the correlation of a spatially-averaged Nusselt number over two parallel walls and the bottom surface of an open-ended channel is derived that permits the individual and interactive effects of the Grashof number, tilt angle, and channel height-to-gap ratio on heat transfers to be evaluated. A criterion for selecting the optimal height-to-gap ratio of the fin channel is subsequently formulated as a design tool for maximizing the convective capability of a free convective fin assembly.
AB - Heat transfer experiments were performed to investigate the effects of inclination and channel height-to-gap ratio on free convection in a simulated fin-passage with a strategic aim of devising a criterion for selecting the optimal fin length that could provide the maximum free convective capability. The ranges of parameters investigated include the Grashof number, up to 500, 000; channel height-to-gap ratios of 1, 2, and 3; and tilt angles of 0°, 30°, 60°, 90°, 120°, 150°, and 180°. Selections of local and spatially averaged Nusselt number results demonstrate the manner by which the Grashof number, tilt angle, and channel height-to-gap ratio interactively affect the heat transfer. In conformity with the experimentally revealed heat transfer physics, the correlation of a spatially-averaged Nusselt number over two parallel walls and the bottom surface of an open-ended channel is derived that permits the individual and interactive effects of the Grashof number, tilt angle, and channel height-to-gap ratio on heat transfers to be evaluated. A criterion for selecting the optimal height-to-gap ratio of the fin channel is subsequently formulated as a design tool for maximizing the convective capability of a free convective fin assembly.
UR - https://www.scopus.com/pages/publications/27744581876
UR - https://www.scopus.com/pages/publications/27744581876#tab=citedBy
U2 - 10.1080/01457630590907310a
DO - 10.1080/01457630590907310a
M3 - Article
AN - SCOPUS:27744581876
SN - 0145-7632
VL - 26
SP - 46
EP - 64
JO - Heat Transfer Engineering
JF - Heat Transfer Engineering
IS - 10
ER -