Free convection heat transfer across rectangular-celled diathermanous honeycombs

Journal Article · Thu Jan 31 23:00:00 EST 1980 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3244252· OSTI ID:5063069

Smart, D R; Hollands, K G.T.; Raithby, G D

Experimental obtained Nusselt number-Rayleigh number plots are presented for free convective heat transfer across inclined honeycomb panels filled with air. The honeycomb cells were rectangular in shape with very long cell dimensions across the slope and comparatively short dimensions up the slope. Elevation aspect ratios, A/sub E/, investigated were 3, 5 and 10; angles of inclination, theta, measured from the horizontal, were 0, 30, 60, 75 and 90 deg. The effect on the Nusselt number, of the emissivities of the plates bounding the honeycomb, and of the emissivity of honeycomb material, was also investigated. The measurements confirmed that the critical Rayleigh number and the post-critical heat transfer depend on the radiant properties of the honeycomb cells. The critical Rayleigh numbers at theta=0 were well predicted by the methods of Sun and Edwards. For 030 deg. The theta=90 deg data were found to be closely correlated by an equation of the form recently proposed by Bejan and Tien.

• Research Organization: Diesel Division, General Motors of Canada, Ltd. London, Ontario, Canada
• OSTI ID: 5063069
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 102:1; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CONFIGURATION
CONVECTION
DATA
ENERGY TRANSFER
EXPERIMENTAL DATA
HEAT TRANSFER
HONEYCOMB STRUCTURES
INFORMATION
MAPS
MECHANICAL STRUCTURES
NATURAL CONVECTION
NUMERICAL DATA
NUSSELT NUMBER
RECTANGULAR CONFIGURATION