Flow modification downstream of a backward-facing step has been tried in order to achieve heat transfer enhancement by introducing two kinds of devices, a triangle prism rib and electromagnetic actuators, on the step edge. The triangle rib attached to the side-wall corner makes the downward flow inclined and generates a circulation-like fluid motion behind it. Because both flows work effective in reducing the flow re-circulation caused behind the step, large heat transfer recovery is obtained near the side-wall. This advantage of the triangle rib remains effective when the flap actuations are imposed. Thus, the large-scale unsteady vortex intensively reduces the flow recirculation, the triangle rib with flap actuations attains the largest heat transfer recovery behind the step.
- Heat Transfer Division
Heat Transfer Enhancement of a Backward-Facing Step Flow in a Duct by Static and Dynamic Devices
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Inaoka, K, Kawakami, K, Nishii, Y, & Senda, M. "Heat Transfer Enhancement of a Backward-Facing Step Flow in a Duct by Static and Dynamic Devices." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 1077-1083. ASME. https://doi.org/10.1115/HT2007-32660
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