Steady-state experiments with one-dimensional and two-dimensional calorimeters were used to study the convective heat transfer near sharp steps in wall temperature in a turbulent boundary layer. Data acquired under low and high freestream turbulence conditions indicated that spanwise turbulent diffusion is not a significant heat transport mechanism for a two-dimensional temperature step. The one-dimensional calorimeter heat transfer data were predicted within ±5 percent using the STAN7 boundary layer code for situations with an abrupt wall temperature step. The conventional correlation with an unheated starting length correction, in contrast, greatly under-predicts the heat transfer for the same experimental cases. A new correlation was developed that is in good agreement with near and far-field semi-analytical solutions and predicts the calorimeter heat transfer data to within ±2 percent for temperature step boundary condition cases.
Convective Heat Transfer Near One-Dimensional and Two-Dimensional Wall Temperature Steps
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division February 20, 2003; revision received November 20, 2003. Associate Editor: S. Acharya.
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Mukerji, D., Eaton, J. K., and Moffat, R. J. (May 4, 2004). "Convective Heat Transfer Near One-Dimensional and Two-Dimensional Wall Temperature Steps ." ASME. J. Heat Transfer. April 2004; 126(2): 202–210. https://doi.org/10.1115/1.1650387
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