This study concerns the flow and heat transfer characteristics of a turbulent submerged circular air jet impinging on a horizontal flat surface when free stream turbulence exceeds 20 percent. The turbulent fluctuations of the free stream velocity are the primary aerodynamics influencing heat transfer. Two regions with distinct flow characteristics are observed: the stagnation region, and the wall-jet region. According to the linear form of the energy equation, the surface heat flux may be decomposed into laminar and turbulent components. An inverse methodology can determine the turbulent component of the heat transfer coefficient in the stagnation region and in the wall-jet region as a function of the root mean square value of the fluctuating component of velocity in the bulk flow direction.
Heat Transfer in a High Turbulence Air Jet Impinging Over a Flat Circular Disk
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division March 28, 2000; revision received November 2, 2001. Associate Editor: M. Hunt.
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Siba, E. A., Ganesa-Pillai, M., Harris , K. T., and Haji-Sheikh, A. (March 21, 2003). "Heat Transfer in a High Turbulence Air Jet Impinging Over a Flat Circular Disk ." ASME. J. Heat Transfer. April 2003; 125(2): 257–265. https://doi.org/10.1115/1.1469523
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