每年出版 6 期
ISSN 打印: 1940-2503
ISSN 在线: 1940-2554
Indexed in
NUMERICAL ANALYSIS OF TRANSPORT PHENOMENA UNDER TURBULENT ANNULAR IMPINGING JET
摘要
The present work deals with the fluid flow and heat-transfer from a flat heated surface owing to impingement of a turbulent annular jet. A parametric study has been conducted for a fixed non-dimensional jet exit-to-target surface distance (H = 2) at different Reynolds number (Re = 10,000−50,000). After the validation of present model with published results, a comprehensive study has been carried out solving Reynolds-averaged Navier-Stokes equation as well as energy equation. The transition shear stress transport model is used for turbulent closure. It has been observed that, the strength, shape, and size of recirculation zones in the flow domain, are strongly dependent of Reynolds number. Increasing Reynolds number magnifies the size of this zone. At high Reynolds number, turbulence contributes to local enhancement of heat-transfer at the impingement zone. Finally, Nusselt number (Nu) is found to scale with Reynolds number in the form Nu = 0.026 × Re0.7896.
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