Numerical simulation of flow interaction between stationary and downstream elastically mounted cylinders in tandem at low Reynolds numbers

Despite the simplicity of the geometry of the circular cylinders, the uniform flow around them is complex, since it may induce unsteady forces on structures associated with vortex shedding. This paper describes the study of two circular cylinders (the downstream one is elastically mounted in transve...

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Bibliographic Details
Published inJournal of the Brazilian Society of Mechanical Sciences and Engineering Vol. 39; no. 3; pp. 801 - 811
Main Authors Teixeira, Paulo R. F., Didier, Eric
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2017
Springer Nature B.V
Subjects
Circular cylinders
Downstream effects
Drag coefficients
Engineering
Finite element method
Fluid dynamics
Fluid flow
Laminar flow
Mathematical models
Mechanical Engineering
Numerical models
Strouhal number
Technical Paper
Uniform flow
Vortex shedding
Finite element method
Flow-induced vibration
Tandem arrangement
Circular cylinders
Wake interference
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Summary:Despite the simplicity of the geometry of the circular cylinders, the uniform flow around them is complex, since it may induce unsteady forces on structures associated with vortex shedding. This paper describes the study of two circular cylinders (the downstream one is elastically mounted in transversal direction) in tandem arrangement subject to bi-dimensional uniform laminar flows at low Reynolds numbers. The academic numerical model Ifeinco , which is based on the finite element method and uses a partitioned scheme that considers two-way interaction of fluid flow and structure, has been employed to the analysis. Firstly, both stationary cylinders in tandem arrangement for Re  = 100 are analysed for center to center distance between the cylinders, L / D , from 1.5 to 6.0. Results of lift and drag coefficients and Strouhal number are compared with other numerical results and good agreement is found. Secondly, numerical results for L / D  = 5.25, considering downstream elastically mounted cylinder, are analysed for Reynolds numbers ranging from 100 to 140. It shows that the resonance occurs for Reynolds numbers between 115 and 120 and the maximum dimensionless amplitude of oscillation is 0.721 for Re  = 118.
ISSN:1678-5878
1806-3691
DOI:10.1007/s40430-016-0682-8