Abstract
AbstractThe flow past a flat plate is the predominant reference case in boundary layer studies. Less attention is payed to the closely related wall jet. The reason may be seen in the existence of a real source (nozzle) which involves a virtual origin. We have dealt with the laminar wall jet problem qualitatively and quantitatively in an earlier paper [2]. In the present paper we complement the flow case with heat transfer for constant wall temperature. The equations are derived and adapted to an experiment comprising a water heated cylinder encompassed by a lengthwise wall jet (air) emanating from a circumferential gap. Analytical transfer rates are compared with experimental ones. Agreement is found without any data fitting. Notably the Reynolds number dependence is confirmed which is Re3/4 instead of Re1/2 for the flat plate.
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