ARTICLE:

• Effects of Surface Modifications on Heat and Fluid Flow Characteristics in Fluid Jets Impinging on a Heated Surface  download article

A. J. C. King
Department of Mechanical Engineering, Curtin University of Technology, Perth, Australia

T. T. Chandratilleke
Department of Mechanical Engineering, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia

ABSTRACT

Impinging jets are well known for their high heat transfer rates. This paper investigates a novel technique for further enhancing heat transfer from an impinging fluid jet. The proposal introduces modifications to the surface in the form of cylindrical cavities (or 'micro-cups') directly beneath the jet. A single impinging jet impinging into a micro-cup with a diameter of twice that of the jet is numerically simulated. A range of jet-to-surface distances, micro-cup depths and jet velocities are modelled. Effects on the heat transfer are identified and discussed. Results indicate heat transfer enhancement is achieved for a number of the studied geometries, with the 'net-depth' a significant factor affecting the heat transfer.

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