Sinnasamy, Yogeswaran; Yahaya, Noor Arbiah; Jaafar, Abdul Aziz; Rafie, Azmin Shakrine Mohd
December 2012
Defence S&T Technical Bulletin;2012, Vol. 5 Issue 2, p135
In flow dynamics, the prediction of reattachment length RL of the main recirculation region (MRR) of a backward-facing step (BFS) step flow is essential to find the effect of Reynolds number Re on MRR formation based on streamline-contour diagram (SCD) and their pattern evolution. In this study, a computational fluid dynamics (CFD) software called PHOENICS is used to model BFS flows and perform computations at values of Re between 100 and 3,000. The expansion ratio ER of the domain is 2, and two numerical schemes, which are HYBRID (HY) and UPWIND (UP), are applied. Based on the flow structure, the reattachment points of the MRRs are traced manually. The lengths of the MRRs are computed, and compared with experimental results and computational data from previous studies.


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