Lattice Boltzmann simulation of the flow interference in bluff body wakes

Surmas, Rodrigo; Santos, Luís Orlando Emerich dos; Philippi, Paulo C.

doi:10.1016/j.future.2003.12.007

Cited by 20 publications

(16 citation statements)

References 16 publications

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“…The flow around two circular cylinders (which is the simplest case of a group or multiple structure), has attracted many researchers (e.g., Li et al, 1991;Williamson, 1985;Mittal et al, 1997;Meneghini and Saltara, 2001;Surmas et al, 2004;Sumner, 2010;Zdravkovich, 1977). Zdravkvich (1977) suggested classifying two cylinder arrangements into three types: tandem (two cylinders are arranged in-line and parallel to the flow direction); side-byside (two cylinders are arranged in-line and perpendicular to the flow direction); and staggered (all arrangements other than the previous two cases).…”

Section: Introductionmentioning

confidence: 99%

“…Zdravkvich (1977) suggested classifying two cylinder arrangements into three types: tandem (two cylinders are arranged in-line and parallel to the flow direction); side-byside (two cylinders are arranged in-line and perpendicular to the flow direction); and staggered (all arrangements other than the previous two cases). Studies on flow around two cylinders in tandem and side-by-side arrangements have been carried out using either experimental or numerical methods (eg., Williamson, 1985;Huhe-Aode et al,1985;Li et al, 1991;Surmas et al, 2004;Mittal et al, 1997;Meneghini and Saltara, 2001;Sharman et al, 2005;Lijungkrona, et al, 1991;Zhou and Yiu, 2006). These investigators found that flow characteristics depend on the Reynolds number (Re) and on the ratio of the distance between the centers of the two cylinders (L) and their combined diameter (D).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have established the relationship between L/D and the variations of drag coefficients in side-by-side and tandem arrangements (e.g., Mittal et al, 1997;Surmas et al, 2004). However, many questions relating to flows past two cylinders remain unstudied, as both the location of the cylinders as well as the Reynolds number interact to affect the flow conditions in a complex manner.…”

Section: Introductionmentioning

confidence: 99%

“…However, many questions relating to flows past two cylinders remain unstudied, as both the location of the cylinders as well as the Reynolds number interact to affect the flow conditions in a complex manner. As limited cases of L/Ds were examined in the previous studies (Mittal et al, 1997;Surmas et al, 2004;Meneghini and Saltara, 2001), the sensitivity of flow characteristics, …”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of flow past two circular cylinders in tandem and side-by-side arrangement at low Reynolds numbers

Ahn

Hwang

2015

KSCE J Civ Eng

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A numerical simulation was used to compare the characteristics of flows past two cylinders in tandem versus side-by-side arrangements. Numerical experiments were performed at various Reynolds numbers and with different distances between the two cylinders. Diverse characteristics of flow, such as drag force, vortex shedding, and pressure distributions were investigated here. In tandem arrangement, at a certain distance, the drag coefficients of both cylinders change abruptly. However, at other distances, the drag coefficients vary somewhat linearly with the distance between cylinders. In side-by-side deployment, when the distance is more than three times the cylinders' diameter, the higher Reynolds number has a smaller drag coefficient (as in the case of a single cylinder). At points where the flow pattern, drag, and pressure coefficients change significantly, the critical spatial ratios between the two cylinders were determined at different Reynolds numbers. In addition to the study of such changes in flow characteristics, the effect of flow pattern on the pressure field and drag force coefficients, as well as their relationship, was also investigated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical simulation of flow past two circular cylinders in tandem and side-by-side arrangement at low Reynolds numbers

Ahn

Hwang

2015

KSCE J Civ Eng

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“…The Strouhal number, as defined as Eq. (10), is a dimensionless frequency of vortex shedding, which is obtained based on the dominant frequency in the time series of lift coefficient using Fourier analysis (Surmas et al, 2004;Menghini and Saltara, 2001;Vu and Hwang, 2014). (10) where f s is the shedding frequency.…”

Section: Numerical Parameters (Fluid Forces Acting On Cylinder)mentioning

confidence: 99%

Numerical investigation of flow around circular cylinder with splitter plate

Ahn

Hwang

2015

KSCE J Civ Eng

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The flow around a single circular cylinder with splitter plate was investigated using Computational Fluid Dynamics. The present study investigated the effects of varying splitter plate length and the Reynolds numbers on flow characteristic, such as vortex shedding, drag force, lift force, separation point, pressure, and friction coefficients of the cylinder. It was revealed that the vortex shedding behind cylinder is completely suppressed when the splitter plate length is longer than the critical value, which is proportional to the Reynolds number. The variation of drag and lift coefficients with respect to splitter length can be classified into two patterns of a monotonic decrease and a general decrease but with small increase. We found that the first pattern occurs at Reynolds number ≤ 180 and higher Reynolds number gives the second pattern. When the splitter plate length is similar to the diameter of the cylinder, the vortex frequency, drag, and lift coefficients reach local minimum depending on the Reynolds number. A functional relationship between drag coefficient, length of splitter plate, and Reynolds number was determined.

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An Implicit Discontinuous Galerkin Chimera Method for Unsteady Laminar Flow Problems with Multiple Bodies

Genuit

Keßler

Krämer

2021

Proc Appl Math & Mech

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The compressible Navier‐Stokes (NS) equations are spatially discretized with the discontinuous Galerkin (DG) method and an implicit backward differentiation formula of second order is used for the temporal discretization. The Chimera method is employed to realize a simple grid generation for complex technical applications consisting of multiple parts. Therefore, non‐trivial overlapping grid areas could occur in the numerical setup which require a robust implementation of the Chimera method. The flow around two circular cylinders in tandem arrangement serves as a validation case and reveals promising results for several configurations compared to reference data in literature.

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Lattice Boltzmann simulation of the flow interference in bluff body wakes

Cited by 20 publications

References 16 publications

Numerical simulation of flow past two circular cylinders in tandem and side-by-side arrangement at low Reynolds numbers

Numerical simulation of flow past two circular cylinders in tandem and side-by-side arrangement at low Reynolds numbers

Numerical investigation of flow around circular cylinder with splitter plate

An Implicit Discontinuous Galerkin Chimera Method for Unsteady Laminar Flow Problems with Multiple Bodies

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