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Christmas Light
’Twas the night before Christmas when all through the house
No electrons were flowing through even my mouse.
All devices were plugged by the chimney with care
With the hope that St. Nikola Tesla would share.
Klaus Rehme
Nuclear Technology | Volume 77 | Number 3 | June 1987 | Pages 331-342
Technical Paper | Heat Transfer and Fluid Flow | doi.org/10.13182/NT87-A33973
Articles are hosted by Taylor and Francis Online.
Measurements of the mean velocity, wall shear stresses, and turbulence have been performed in a rod bundle of four parallel rods arranged in a rectangular channel (P/D = W/D = 1.148) for three ratios of length-to-hydraulic diameter (L/Dh). Distributions of the mean velocity and the wall shear stresses have been measured in four quadrants for L/Dh = 48.7, 73.0, and 97.4. The full Reynolds stress tensor has been determined by the hot-wire technique in only one quadrant for each L/Dh ratio. The Reynolds number of this investigation was Re = 1.17 × 105. The experimental results show that the structure of turbulence does not change significantly between L/Dh = 48.7 and 97.4. The flow redistribution among the subchannels caused by the inlet conditions, however, is not completed at L/Dh = 97.4. The experimental wall shear stresses at L/Dh = 97.4 agree satisfactorily with the wall shear stresses calculated by the VELASCO code.
