Early stages of an impulsively started unsteady laminar flow past tapered trapezoidal cylinders

Lee, T. S.

doi:10.1002/(sici)1097-0363(19980615)26:10<1181::aid-fld685>3.0.co;2-v

Cited by 17 publications

(3 citation statements)

References 16 publications

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“…Tian and Wu [2] generalized a relationship between Strouhal and Reynolds numbers by an extensive analytical and computational investigation of two-dimensional flow around regular polygons at low Reynolds number. Lee [3]studied numerically the symmetrical wake flow developments around a tapered trapezoidal cylinder. Kahawita and Wang [4] discussed briefly the influence of the trapezoidal shape on the vortex shedding and on the critical Reynolds number value.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of flow rate measure using vortex counting at low Reynolds number

Zaaraoui

2017

18th International Congress of Metrology

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Abstract. You The trapezoidal bluff body is a typical configuration of vortex shedding bodies. The aim of this work is to study flow behaviour over a trapezoidal cylinder at low Reynolds number. The geometry was constructed from a prototype device for measuring the volumetric flow-rate by counting vortices. Simulations were run for this geometry under steady and unsteady flow conditions using finite volume discretization. Laminar flow was investigated in this model with rigid walls and homogeneous incompressible Newtonian fluid. Calculations were performed for Reynolds number range 5 Re 200 and several flow parameters were documented. The present computations are in good agreement with the experimental observations and the numerical calculations by several investigators.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of flow rate measure using vortex counting at low Reynolds number

Zaaraoui

2017

18th International Congress of Metrology

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“…They obtained the scaling laws for the evolution of global mode describing the envelope of the peak to peak amplitude velocity oscillation in the wake flow downstream of the body. Lee [3] numerically studied the early stages of the symmetrical wake flow developments around a tapered trapezoidal cylinder/prism for Re ranging from 25 to 1,000. The flow starts with no separation and as the time advances, the symmetrical standing zone of circulation develops after the trapezoidal prism.…”

Section: Introductionmentioning

confidence: 99%

“…[3]. The variation of Strouhal number (St) from a tapered trapezoidal prism was studied numerically by Chung and Kang [4] for Re = 100-200.…”

Section: Introductionmentioning

confidence: 99%

Transition to periodic unsteady and effects of Prandtl and Richardson numbers on the flow across a confined heated trapezoidal prism

Parveez

Dhiman

Rasool

2014

J Braz. Soc. Mech. Sci. Eng.

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Flow and heat transfer over a trapezoidal cylinder: steady and unsteady regimes

Dhiman

Hasan

2012

Asia-Pacific J Chem Eng

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Two‐dimensional unconfined flow and heat transfer across a long tapered trapezoidal bluff body are investigated for the range Re = 1 to 150 (thereby covering both steady and unsteady periodic regimes) and Pr = 0.7 (air). A number of engineering parameters, e.g. drag and lift coefficients, Strouhal and Nusselt numbers, and others, is calculated for the above range of conditions. No flow separation occurs from the surface of the trapezoidal cylinder for the range Re ≤ 5; however, flow starts to separate from the rear surface of the cylinder at Re = 6. Therefore, the onset of flow separation exits between Re = 5 and 6. The critical value of the Reynolds number (i.e. transition from steady to unsteady) exists between Re = 46 and 47. The drag coefficient decreases with increasing Reynolds number in the steady regime; however, the drag increases with Reynolds number in the unsteady regime. The Strouhal number and the average Nusselt number increase with increasing value of the Reynolds number. Finally, the simple correlation for the average Nusselt number is obtained in the steady flow regime. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.

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Early stages of an impulsively started unsteady laminar flow past tapered trapezoidal cylinders

Cited by 17 publications

References 16 publications

Numerical investigation of flow rate measure using vortex counting at low Reynolds number

Numerical investigation of flow rate measure using vortex counting at low Reynolds number

Transition to periodic unsteady and effects of Prandtl and Richardson numbers on the flow across a confined heated trapezoidal prism

Flow and heat transfer over a trapezoidal cylinder: steady and unsteady regimes

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