LAPSE:2023.26113
Published Article
LAPSE:2023.26113
Control and Suppression of Vortex Shedding from a Slightly Rough Circular Cylinder by a Discrete Vortex Method
Marcos André de Oliveira, Paulo Guimarães de Moraes, Crystianne Lilian de Andrade, Alex Mendonça Bimbato, Luiz Antonio Alcântara Pereira
March 31, 2023
A discrete vortex method is implemented with a hybrid control technique of vortex shedding to solve the problem of the two-dimensional flow past a slightly rough circular cylinder in the vicinity of a moving wall. In the present approach, the passive control technique is inspired on the fundamental principle of surface roughness, promoting modifications on the cylinder geometry to affect the vortex shedding formation. A relative roughness size of ε*/d* = 0.001 (ε* is the average roughness and d* is the outer cylinder diameter) is chosen for the test cases. On the other hand, the active control technique uses a wall plane, which runs at the same speed as the free stream velocity to contribute with external energy affecting the fluid flow. The gap-to-diameter varies in the range from h*/d* = 0.05 to 0.80 (h* is the gap between the moving wall and the cylinder bottom). A detailed account of the time history of pressure distributions, simultaneously investigated with the time evolution of forces, Strouhal number behavior, and boundary layer separation are reported at upper-subcritical Reynolds number flows of Re = 1.0 × 105. The saturation state of the numerical simulations is demonstrated through the analysis of the Strouhal number behavior obtained from temporal history of the aerodynamic loads. The present work provides an improvement in the prediction of Strouhal number than other studies no using roughness model. The aerodynamic characteristics of the cylinder, as well as the control of intermittence and complete interruption of von Kármán-type vortex shedding have been better clarified.
Keywords
bluff body, Lagrangian description, roughness model, suppression hybrid control, Venturi effect
Suggested Citation
Oliveira MAD, Moraes PGD, Andrade CLD, Bimbato AM, Alcântara Pereira LA. Control and Suppression of Vortex Shedding from a Slightly Rough Circular Cylinder by a Discrete Vortex Method. (2023). LAPSE:2023.26113
Author Affiliations
Oliveira MAD: Mechanical Engineering Institute, Federal University of Itajubá (UNIFEI), Itajubá MG 37.500-903, Brazil [ORCID]
Moraes PGD: Mechanical Engineering Institute, Federal University of Itajubá (UNIFEI), Itajubá MG 37.500-903, Brazil
Andrade CLD: Mechanical Engineering Institute, Federal University of Itajubá (UNIFEI), Itajubá MG 37.500-903, Brazil
Bimbato AM: School of Engineering, São Paulo State University (UNESP), Guaratinguetá SP 12.516-410, Brazil [ORCID]
Alcântara Pereira LA: Mechanical Engineering Institute, Federal University of Itajubá (UNIFEI), Itajubá MG 37.500-903, Brazil [ORCID]
Journal Name
Energies
Volume
13
Issue
17
Article Number
E4481
Year
2020
Publication Date
2020-08-31
Published Version
ISSN
1996-1073
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PII: en13174481, Publication Type: Journal Article
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LAPSE:2023.26113
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doi:10.3390/en13174481
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Mar 31, 2023
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