%0 Journal Article %A Oleskowicz-Popiel, Czeslaw %A Wojtkowiak, Janusz %D 2010 %I Begell House %K natural convection, heat transfer, horizontal plate %N 3 %P 299-311 %R 10.1615/HeatTransRes.v41.i3.70 %T Experiments on Natural Convection Heat Transfer from an Isothermal Plate on a Semi-Infinite Surface and from a Constrained Horizontal Plate in Air %U https://www.dl.begellhouse.com/journals/46784ef93dddff27,65dad0407c8ce877,505458280ac9096f.html %V 41 %X Measurements were performed to determine the average natural convection heat transfer characteristics for an isothermal, upward-facing horizontal constrained rectangular plate, i.e., surrounded (fenced) by vertical adiabatic walls. Results revealed that for the Rayleigh number ranging from Ra = 1.8 × 106 to 1.5 × 107 and relative height of the walls in the range from about H/W = 0.25 to 1.0 the average Nusselt number is described by the equation Nu = 0.458 Ra0.271. These results are higher in comparison with the data obtained for an isothermal horizontal plate on a semi-infinite surface by about 15 to 18% in a laminar region and 12 to 11% in a turbulent region. The aspect ratio of the rectangular plate was Y/W = 2.548. %8 2010-08-12