Numerical simulations for incompressible three-dimensional laminar forced convection flow adjacent to backward-facing step in rectangular duct are performed to examine the reattachment region of the separated flow on the stepped wall. The feasibility of utilizing the two-dimensional flow definition and the limiting streamline definition for identifying the reattachment line/region was examined. The downwash and the “jet-like” flow that develops near the sidewall creates significant spanwise flow adjacent to the stepped wall, making it difficult to identify a reattachment line/region both numerically and experimentally. The use of the line/region that identifies the location on a plane adjacent to the stepped wall where the gradient of the mean streamwise velocity component is zero is recommended for code and apparatus validation of three-dimensional separated flow.
Reattachment of Three-Dimensional Flow Adjacent to Backward-Facing Step
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division July 5, 2002; revision received February 13, 2003. Associate Editor: V. Prasad.
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Nie , J. H., and Armaly, B. F. (May 20, 2003). "Reattachment of Three-Dimensional Flow Adjacent to Backward-Facing Step ." ASME. J. Heat Transfer. June 2003; 125(3): 422–428. https://doi.org/10.1115/1.1571091
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