Abstract
The horizontal cylinder is the geometry in which the problem of evaluating the peak nucleate boiling heat flux q{sub max} (commonly called the burnout heat flux) has been most studied. Countless data have been presented but many are subject. Countless data have been presented but many are subject to a variety of nuisance variables. The objective of the present work is to identify experimentally the range of influence of two of these nuisance variables: sidewall blockage and immersion depth. The existing hydrodynamic predictions of q{sub max} envision either an infinite flat plate beneath an infinitely deep liquid bath, or a finite heater immersed in a bath of infinite extent. Attention has been given to such effects in other geometries. However, the effect of nearby walls or depth of immersion on horizontal cylinder has not been systematically documented. The authors aim here is determine, experimentally, how q{sub max} is altered when a long horizontal cylinder is centered between vertical sidewalls separated by a distance and located a distance below the liquid surface.
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