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EPTT 2024
14th Spring School on Transition and Turbulence
Numerical Investigation of the Backward Facing Step Configuration Using ILES Methodology
Submission Author:
Bruno Scapin , RS , Brazil
Co-Authors:
Bruno Scapin, Guilherme Vargas, Karina Ruschel, Edith Beatriz Camaño Schettini
Presenter: Bruno Scapin
doi://10.26678/ABCM.EPTT2024.EPT24-0012
Abstract
This study explores the turbulent flow of the Backward Facing Step (BFS) configuration using the Implicit Large Eddy Simulation (ILES) method. We present a comparative analysis of our simulation results against physical outcomes available in the current literature, focusing on the characteristics of recirculation zones and wall shear rates. The ILES formulation showed consistency in replicating flow characteristics for the adopted configuration, and the results exhibited good agreement with published experimental works. Some discrepancies were found for high Reynolds number simulations, which were explained due the definition of the characteristic length of the flow. Coherent structures generated by the turbulent flow, such as Streaks and Hairpin Vortices, were identified. Our study also explored the hydraulic energy of the flux when a well-developed regime is achieved. The calculation of the total head allowed us to compute the friction factor, which showed good agreement with theoretical values. This work contributes to understanding the effects of Reynolds number and geometry on the BFS configuration and can provide a basis for future optimizations in practical applications, such as the design of hydraulic structures and mechanical components.
Keywords
Backward Facing Step, Implicit Large-Eddy Simulation, Numerical Modeling
