Investigation of Optimum Conditions for Flow Control Around Two Inline Square Cylinders

Abbasi, Waqas Sarwar; Naheed, Anam; Islam, Shams Ul; Rahman, Hamid

doi:10.1007/s13369-020-05303-x

Cited by 7 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicate a good qualitative agreement between our findings and those of other researchers. For further details regarding the validation of our code, readers are referred to our published work 26 – 28 .…”

Section: Problem Descriptionmentioning

confidence: 99%

“…Mohammad 24 provided a comprehensive guide on LBM fundamentals and engineering applications. Studies by Islam et al 25 and Abbasi et al 26 – 28 explored force statistics, wake structures, and flow control around square cylinders, enhancing the understanding of flow behavior and optimization strategies. Ali et al 29 and Vinodh and Supradeepan 30 investigated flow modification techniques and control cylinder influences, offering practical insights for engineering applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing hydrodynamic forces through miniaturized control of square cylinders using the lattice Boltzmann method

Refaie Ali,

Abbasi,

Younus

et al. 2024

Sci Rep

View full text Add to dashboard Cite

This study investigates the influence of small control cylinders on the fluid dynamics around a square cylinder using the Lattice Boltzmann Method (LBM). Varying the gaps (L) between the main and control cylinders from 0 to 6, four distinct flow regimes are identified: the solo body regime (SBR), shear layer reattachment (SLR), suppressed fully developed flow (SFDF), and intermittent shedding (IS). The presence of control cylinders results in significant reductions in flow-induced forces, with drag coefficient (CD) and root mean square values of drag and lift coefficients (CDrms and CLrms) decreasing by approximately 31%, 90%, and 81%, respectively. The SFDF flow regime exhibits the lowest fluid forces compared to other regimes. The effects of tiny control cylinders on the fluid flow characteristics of a square cylinder are examined using the Lattice Boltzmann Method (LBM) in this research work. The gaps (L) between the main and control cylinders are varied in the range from 0 to 6. The size of each control cylinder is equal to one-fifth of the primary cylinder. According to the findings, there are four distinct flow regimes as the gap spacing varies: solo body regime (SBR), shear layer reattachment (SLR), suppressed fully developed flow (SFDF), and intermittent shedding (IS) for gap spacing ranges 0 ≤ L ≤ 0.2, 0.3 ≤ L ≤ 0.9, 1 ≤ L ≤ 3, and 3.2 ≤ L ≤ 6, respectively. Additionally, it has been noted that the amplitude of variable lift force is reduced when the gap separation between the main and control cylinders is increased. When compared to solo cylinder values, it is found that the presence of small control cylinders in the flow field results in a considerable reduction of flow-induced forces. The SFDF flow regime was determined to have the lowest fluid forces compared to the other flow regimes studied. Our findings highlight the efficacy of small control cylinders in mitigating flow-induced forces and controlling flow characteristics. The LBM proves to be a valuable computational technique for such fluid flow problems.

show abstract

Section: Problem Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing hydrodynamic forces through miniaturized control of square cylinders using the lattice Boltzmann method

Refaie Ali,

Abbasi,

Younus

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Their research involved an in-depth exploration of the flow structures within the far-wake regions behind the downstream square cylinders, enabling the identification of the mechanisms responsible for their formation. Abbasi, W. S., et al (Abbasi et al, 2021) numerically studied the flow control around two square cylinders using a flat plate set in the wake to investigate the optimum conditions for modifying vortex shedding and reducing fluid forces. The gap spacing varied between 0.5 ≤ G ≤ 10, with fixed Re = 150.…”

Section: Introductionmentioning

confidence: 99%

Extensive study of flow characters for two vertical rectangular polygons in a two-dimensional cross flow

Gul,

Nazeer,

Sana

et al. 2024

Front. Mech. Eng.

Self Cite

View full text Add to dashboard Cite

Fluid dynamics problems have a significant impact on the growth of science and technologies all over the world. This study investigates viscous fluid’s behavior when interacting with two rectangular polygons positioned vertically and aligned in a staggered configuration. Two physical parameters, Reynolds Number and Gap spacings, are discussed using the Lattice Boltzmann Method for two-dimensional flow. Results are discussed in vortex snapshots, time trace histories of drag and lift coefficient, and power spectra analysis of lift coefficient. Nine distinct flow vortex streets are identified based on increasing gap spacings between the pair of two rectangular polygons. The vortex shedding mechanism is disturbed at small gap spacings and becomes optimal at large gap spacings. Different physical parameters of practical importance, like mean drag coefficient, root mean square values of drag coefficient, root mean square values of lift coefficient, and Strouhal number, approach the single rectangular polygon value at large gap spacings.

show abstract

Control of irregular flows and fluid forces around two offset cylinders in the presence of control plate

Ullah,

Shams-ul-Islam,

Lin

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Investigation of Optimum Conditions for Flow Control Around Two Inline Square Cylinders

Cited by 7 publications

References 27 publications

Enhancing hydrodynamic forces through miniaturized control of square cylinders using the lattice Boltzmann method

Enhancing hydrodynamic forces through miniaturized control of square cylinders using the lattice Boltzmann method

Extensive study of flow characters for two vertical rectangular polygons in a two-dimensional cross flow

Control of irregular flows and fluid forces around two offset cylinders in the presence of control plate

Contact Info

Product

Resources

About