The Influence of Fillet Step on Backward-Facing Step Flow Characteristics
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Abstract
Backward-facing step (BFS) is a model that provides several applicative features in engineering. The complex phenomena of BFS flow have a crucial impact on any application. Therefore, this study comprehensively investigates the flow characteristics of BFS with various step shapes. The backward-facing step (F-BFS) fillets were tested at intervals of Reynolds number 50 smaller than Re smaller than 400 using the CFD approach. Based on the computational results, it was found that flow separation is a fundamental phenomenon in BFS flow. Due to sudden expansion, Flow separation forms a recirculation area which continues to increase almost linearly with an increase in the Reynolds number. The recirculation area contains unstable rotating vortexes, which can impact the flow efficiency of BFS. Using a different step shape proves that F-BFS can minimize the recirculation area to increase the efficiency of the BFS flow.
References
L. Chen, K. Asai, T. Nonomura, G. Xi, and T. Liu, “A review of Backward-Facing Step (BFS) flow mechanisms, heat transfer and control,” Thermal Science and Engineering Progress, vol. 6, pp. 194–216, 2018, doi: https://doi.org/10.1016/j.tsep.2018.04.004.
D. Yang, B. Sun, T. Xu, B. Liu, and H. Li, “Experimental and numerical study on the flow and heat transfer characteristic of nanofluid in the recirculation zone of backward-facing step microchannels,” Appl Therm Eng, vol. 199, p. 117527, 2021, doi: https://doi.org/10.1016/j.applthermaleng.2021.117527.
G. Guo, H. Liu, and B. Zhang, “Numerical study of active flow control over a hypersonic backward-facing step using supersonic jet in near space,” Acta Astronaut, vol. 132, pp. 256–267, 2017, doi: https://doi.org/10.1016/j.actaastro.2016.12.035.
R. Huang, X. Luo, B. Ji, and J. Qingfeng, “Turbulent Flows Over a Backward Facing Step Simulated Using a Modified Partially Averaged Navier–Stokes Model,” J Fluids Eng, vol. 139, May 2016, doi: 10.1115/1.4035114.
S. Scharnowski, I. Bolgar, and C. Kähler, “Characterization of Turbulent Structures in a Transonic Backward-Facing Step Flow,” Flow Turbul Combust, vol. 98, May 2017, doi: 10.1007/s10494-016-9792-8.
A. Sivan, D. Saravanan, and Y. S. Rammohan, “A numerical study to reduce the drag effects in hypersonic flow over the backward facing step,” Mater Today Proc, vol. 52, pp. 963–970, 2022, doi: https://doi.org/10.1016/j.matpr.2021.10.429.
J. Morita, H. Mamori, and T. Miyazaki, “Direct numerical simulation of the backward-facing step turbulent flow controlled by traveling wave-like body force,” Int J Heat Fluid Flow, vol. 95, p. 108964, 2022, doi: https://doi.org/10.1016/j.ijheatfluidflow.2022.108964.
T. McQueen, D. Burton, J. Sheridan, and M. C. Thompson, “Active control of flow over a backward-facing step at high Reynolds numbers,” Int J Heat Fluid Flow, vol. 93, p. 108891, 2022, doi: https://doi.org/10.1016/j.ijheatfluidflow.2021.108891.
G. Biswas, M. Breuer, and F. Durst, “Backward-Facing Step Flows for Various Expansion Ratios at Low and Moderate Reynolds Numbers,” J Fluids Eng, vol. 126, no. 3, pp. 362–374, Jul. 2004, doi: 10.1115/1.1760532.
S. Inam and M. Lappa, “Hybrid forced-buoyancy convection in a channel with a backward facing step,” Int J Heat Mass Transf, vol. 194, p. 122963, 2022, doi: https://doi.org/10.1016/j.ijheatmasstransfer.2022.122963.
G. Guo, H. Liu, and B. Zhang, “Numerical study of active flow control over a hypersonic backward-facing step using supersonic jet in near space,” Acta Astronaut, vol. 132, pp. 256–267, May 2017, doi: 10.1016/j.actaastro.2016.12.035.
B. Armaly, F. Durst, J. Pereira, and B. Schönung, “Experimental and Theoretical Investigation of Backward-Facing Step Flow,” J Fluid Mech, vol. 127, pp. 473–496, May 1983, doi: 10.1017/S0022112083002839.
A. S. A. N. D. R. N. A. A. N. D. A. K. A. Aftab S. M. A. AND Mohd Rafie, “Turbulence Model Selection for Low Reynolds Number Flows,” PLoS One, vol. 11, no. 4, pp. 1–15, May 2016, doi: 10.1371/journal.pone.0153755.
J. Julian, W. Iskandar, F. Wahyuni, A. Armansyah, and F. Ferdyanto, “Effect of Single Slat and Double Slat on Aerodynamic Performance of NACA 4415,” International Journal of Marine Engineering Innovation and Research, vol. 7, no. 2, 2022.
J. Julian, W. Iskandar, and F. Wahyuni, “COMPUTATIONAL FLUID DYNAMICS ANALYSIS BASED ON THE FLUID FLOW SEPARATION POINT ON THE UPPER SIDE OF THE NACA 0015 AIRFOIL WITH THE COEFFICIENT OF FRICTION,” Jurnal Media Mesin, vol. 23, no. 2.
P. J. Roache, “Perspective: a method for uniform reporting of grid refinement studies,” 1994.
J. Julian, W. Iskandar, and F. Wahyuni, “Aerodynamics Improvement of NACA 0015 by Using Co-Flow Jet,” International Journal of Marine Engineering Innovation and Research, vol. 7, pp. 1479–2548, Mar. 2022, doi: 10.12962/j25481479.v7i4.14898.
J. Julian, W. Iskandar, F. Wahyuni, and N. T. Bunga, “Aerodynamic Performance Improvement on NACA 4415 Airfoil by Using Cavity,” Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi, vol. 5, no. 1, Jan. 2023, doi: 10.35814/asiimetrik.v5i1.4259.
J. Julian, W. Iskandar, F. Wahyuni, and N. T. Bunga, “Characterization of the Co-Flow Jet Effect as One of the Flow Control Devices,” Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi, pp. 185–192, 2022.
W. Iskandar, J. Julian, F. Wahyuni, F. Ferdyanto, H. Prabu, and F. Yulia, “Study of Airfoil Characteristics on NACA 4415 with Reynolds Number Variations,” International Review on Modelling and Simulations (IREMOS), vol. 15, p. 162, Feb. 2022, doi: 10.15866/iremos.v15i3.21684.
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