Heat Transfer Suppression in Flow Around a Rotating Circular Cylinder at High Prandtl Number

Sufyan, Muhammad; Manzoor, S.; Sheikh, Nadeem Ahmed

doi:10.1007/s13369-014-1337-7

Cited by 11 publications

(8 citation statements)

References 24 publications

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“…In contrast, the drag coefficient obeys the trend in a parallel mode as a consequence of a decline in the pressure drag. Both the scenarios are in good comparison with the descriptions stated by Kang et al [11], Paramane and Sharma [20] and Sufyan et al [24]. The vortical gust illustrates a significant interaction effect on the time histories of lift coefficients, enacted to a mean free stream flow as depicted in Fig.…”

Section: Validationsupporting

confidence: 80%

“…In contrast, average Nusselt number reduces at higher rotation rates for particular values of Re and Pr in a steady flow regime as proposed by Sharma and Dhiman [23]. Sufyan et al [24] explored the suppression of heat transfer for a rotating cylinder at higher Pr values, even at inferior spinning rates. The influence of a single gust impulse on a rotating circular cylinder has been studied by Ikhtiar et al [25], revealed the interesting facts regarding the Nusselt number behaviour.…”

Section: Introductionmentioning

confidence: 97%

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Numerical Investigation of Counter-Rotating Vortical Gust Impingement Effect on a Rotating Cylinder

Anwar¹,

Manzoor²

2019

Applied Engineering Letters

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The influence of a counter-rotating vortical gust pair is numerically investigated on a streamlined laminar flow and forced convection heat transfer around a steadily rotating two-dimensional circular cylinder. Reynolds number is kept to a fixed value of 100 based on cylinder diameter (D). The working fluid used is water having a fixed Prandtl number of 7. The non-dimensional rotation rate is altered within the vortex shedding regime i.e. 0≤α≤1.5 in the steps of 0.25. The numerical results were computed via commercially accessible CFD software package FLUENT®. The governing flow equations are continuity, momentum, and energy equations have been resolved via constant wall temperature (CWT) boundary condition. The numerical outcomes are computed illustrating the variation in the lift coefficient, Strouhal number, average and local Nusselt number, vorticity and temperature contours around the isothermal rotating cylinder. The influence of the vortical gust is observed to stretch the shear layer in a typical manner. The vortical gust can be treated as an additional heat transfer suppression technique in conjunction with rotation for a circular cylinder. ARTICLE HISTORY

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Section: Validationsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 97%

Numerical Investigation of Counter-Rotating Vortical Gust Impingement Effect on a Rotating Cylinder

Anwar¹,

Manzoor²

2019

Applied Engineering Letters

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“…Their results show that, at higher rotational velocity, the Nusselt number is almost independent of Reynolds number and thermal boundary conditions. The suppression of von Karman Street was also reported numerically in [3] for Reynolds numbers of 80-160 and rotation rate was examined up to a maximum value of 5.3 in the range of 0-6 at Pr equal 7. For steady regime, a well-organized numerical study was published in [4].…”

Section: Introductionmentioning

confidence: 68%

Unconfined laminar nanofluid flow and heat transfer around a rotating circular cylinder in the steady regime

Bouakkaz

Salhi

Khelili

et al. 2017

Archives of Thermodynamics

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In this work, steady flow-field and heat transfer through a copper-water nanofluid around a rotating circular cylinder with a constant nondimensional rotation rate α varying from 0 to 5 was investigated for Reynolds numbers of 5-40. Furthermore, the range of nanoparticle volume fractions considered is 0-5%. The effect of volume fraction of nanoparticles on the fluid flow and heat transfer characteristics are carried out by using a finite-volume method based commercial computational fluid dynamics solver. The variation of the local and the average Nusselt numbers with Reynolds number, volume fractions, and rotation rate are presented for the range of conditions. The average Nusselt number is found to decrease with increasing value of the rotation rate for the fixed value of the Reynolds num- * Corresponding Author.

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“…There are N t points in the circumferential direction on the cylinder surface and the radial thickness of the first layer of cells (i.e., cells attached to the wall) is h Dt . In this study, following literature data [5,6], the computational domain extends 40 times the diameter of the cylinder in all directions. The grids sensitivity analysis is performed for Re=40 and φ=0.05.…”

Section: Domain Independence Studymentioning

confidence: 99%

“…The flow and heat transfer over an isothermal across a rotating cylinder in the range 0 ≤ α ≤ 6 with Re number varying from 20 to 160 was studied in literature [5][6][7]. In depth analysis, it was revealed that the rotation can be used as a drag reduction and heat transfer suppression technique.…”

mentioning

confidence: 99%

Numerical investigation of fluid flow and heat transfer around a circular cylinder utilizing nanofluid for different thermal boundary condition in the steady regime

Bouakkaz¹,

Salhi

Khelili

et al. 2017

Metall Mater Eng

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In this work, steady flow-field and heat transfer through a copper–water nanofluid around a circular cylinder, under the influence of both the standard thermal boundary conditions i.e. uniform heat flux (UHF) and constant wall temperature (CWT) was investigated numerically by using a finite-volume method for Reynolds numbers of 10 to 40. Furthermore, the range of nanoparticle volume fractions (φ) considered is 0 ≤ φ ≤ 5%. The variation of the local and the average Nusselt numbers with Reynolds number, and volume fractions are presented for the range of conditions. The average Nusselt number is found to increase with increasing the nanoparticle volume fractions.

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Heat Transfer Suppression in Flow Around a Rotating Circular Cylinder at High Prandtl Number

Cited by 11 publications

References 24 publications

Numerical Investigation of Counter-Rotating Vortical Gust Impingement Effect on a Rotating Cylinder

Numerical Investigation of Counter-Rotating Vortical Gust Impingement Effect on a Rotating Cylinder

Unconfined laminar nanofluid flow and heat transfer around a rotating circular cylinder in the steady regime

Numerical investigation of fluid flow and heat transfer around a circular cylinder utilizing nanofluid for different thermal boundary condition in the steady regime

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