Heat transfer and hydrodynamics of free water jet impingement at low nozzle-to-plate spacings

•The effect of nozzle-to-plate spacing on a free water impinging jet was investigated.•The stagnation Nusselt number, pressure, and hydraulic jump diameter show same trend at low nozzle-to-plate spacings.•The Nusselt number, hydraulic jump diameter, and pressure are divided into two regions.•The Nus...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2017-05, Vol.108, p.2211-2216
Main Authors: Kuraan, Abdullah M., Moldovan, Stefan I., Choo, Kyosung
Format: Article
Language:English
Subjects:
Circular
Flat plate
Impinging jet
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Summary:•The effect of nozzle-to-plate spacing on a free water impinging jet was investigated.•The stagnation Nusselt number, pressure, and hydraulic jump diameter show same trend at low nozzle-to-plate spacings.•The Nusselt number, hydraulic jump diameter, and pressure are divided into two regions.•The Nusselt number, hydraulic jump diameter, and pressure is a function of the nozzle-to-plate spacing alone. In this study, heat transfer and hydrodynamics of a free water jet impinging a flat plate surface are experimentally investigated. The effects of the nozzle-to-plate spacing, which is equal to or less than one nozzle diameter (H/d=0.08–1), on the Nusselt number, hydraulic jump diameter, and pressure at the stagnation point are considered. The results show that the normalized stagnation Nusselt number, pressure, and hydraulic jump diameter are divided into two regions: Region (I) jet deflection region (H/d⩽0.4) and Region (II) inertia dominant region (0.4
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2017.01.084