Reattachment of Three-Dimensional Flow Adjacent to Backward-Facing Step
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 (du/dy y=o=O)is recommended for code and apparatus validation of three-dimensional separated flow.
J. H. Nie and B. F. Armaly, "Reattachment of Three-Dimensional Flow Adjacent to Backward-Facing Step," Journal of Heat Transfer, American Society of Mechanical Engineers (ASME), Jun 2003.
The definitive version is available at http://dx.doi.org/10.1115/1.1571091
Mechanical and Aerospace Engineering
National Science Foundation (U.S.)
Keywords and Phrases
Convection; Heat Transfer; Reattachment; Recirculating; Three-Dimensional
Article - Journal
© 2003 American Society of Mechanical Engineers (ASME), All rights reserved.