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

Teixeira, Paulo R.F.; Didier, Éric

doi:10.1007/s40430-016-0682-8

Cited by 7 publications

(12 citation statements)

References 21 publications

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“…Results in terms of lift and drag coefficients and displacement of elastically mounted cylinders are analyzed. Comparisons with results found by Teixeira and Didier's study [11], in which upstream cylinder is stationary and downstream cylinder is elastically mounted, and by Gonçalves et al [26], for a single cylinder case, are carried out.…”

Section: Introductionmentioning

confidence: 86%

“…The center-to-center distance is 5.25D that characterizes a co-shedding regime (L > L c ), with enough proximity between the two cylinders to ensure strong mutual interference (phase/antiphase between the vortex shed from the upstream cylinder and the vortex shed from t he downstream one). Natural frequency is [30] and Gonçalves et al [26] in the case of single circular cylinder, and Teixeira and Didier [11] in the case of two cylinders in tandem.…”

Section: Ifeinco Numerical Modelmentioning

confidence: 93%

“…In Ifeinco code, Eq. (5) is discretized in time by using the implicit Newmark method [29], whereas the acceleration, the velocity and the displacement in transverse direction are calculated at each time step, according to the algorithm described by Teixeira and Didier [11].…”

Section: Ifeinco Numerical Modelmentioning

confidence: 99%

“…In this regime, the two cylinders shed vortices separately at the same frequencies, forming a vortex street in the gap between as well as behind the cylinders. In this case, the downstream cylinder is inside the near-wake of the upstream one [6][7][8][9][10][11]. Drag (C D ) and lift (C L ) coefficients are highly dependent on oncoming flow conditions and the center-to-center spacing.…”

Section: Introductionmentioning

confidence: 99%

“…Drag (C D ) and lift (C L ) coefficients are highly dependent on oncoming flow conditions and the center-to-center spacing. They jump markedly at the critical spacing at low Reynolds numbers [7][8][9][10][11] and in sub-critical regime [6]. Some authors, such as Zdravkovich [12,13] and Medeiros and Zdravkovich [14], have reported that, in these cases, the upstream cylinder undergoes a very similar action to that of a single one.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of the interference between two elastically mounted cylinders in tandem subject to flows at low Reynolds numbers

Teixeira

Rechsteiner

Didier

2019

J Braz. Soc. Mech. Sci. Eng.

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Fluid-dynamic interference among cylindrical structures in arrays, frequently used in engineering, is of fundamental and practical interests since it may considerably change fluid-structure interactions and produce large fluctuating forces on structures that cause vibrations, lock-in and important motions. This paper aims to study the mutual interference between two circular cylinders in tandem arrangement, which is considered the simplest configuration of one array cylinders, elastically mounted in transversal direction and subject to a bi-dimensional uniform laminar flow at low Reynolds numbers. Both cylinders have the same diameter D, and the center-to-center spacing is equal to L = 5.25D which corresponds to co-shedding regime. 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. Combinations of upstream and downstream stationary and elastically mounted cylinders are investigated for Reynolds number range from 90 to 140. Differences of flow behaviors drag and lift forces and resonance between single cylinder and cylinders in tandem arrangement were found. Mutual and respective influences of upstream cylinder motion on the downstream cylinder and vice versa are analyzed. Results show that, in some engineering studies, the consideration of the flexibility of cylindrical structures in arrays is fundamental since it influences significantly the interference between cylinders, mainly the magnitude and direction of forces and characteristics of the resonance range, and, consequently, structural and dynamical behaviors.

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Section: Introductionmentioning

confidence: 86%