Laminar momentum and heat transfer phenomena of power-law dilatant fluids around an asymmetrically confined cylinder

Bijjam, Sudheer; Dhiman, Amit; Gautam, Vandana

doi:10.1016/j.ijthermalsci.2014.09.015

Cited by 17 publications

(5 citation statements)

References 28 publications

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“…The entire domain independence test was done taking grid G1 with the minimum dimensionless grid size of 0.01. These distances are also consistent with the literature [5][6][7][8]17,19,21,23].…”

Section: Selection Of Numerical Parameterssupporting

confidence: 92%

“…In [15][16][17][18] a heated circular cylinder is symmetrically placed (gap ratio γ = 1) in a channel and forced convection (Richardson number Ri = 0) is assumed. Progress in research on the forced convection can also be found for the asymmetrical placement of a circular cylinder in the confined domain [19][20][21][22][23]. Mettu et al [19] explored flow around and forced convection from a circular cylinder placed asymmetrically in a planar channel for Reynolds number Re ranging from 10 to 500, blockage ratio β from 0.1 to 0.4, gap ratio γ from 0.125 to 1 and Prandtl number Pr = 0.744.…”

Section: Current Status Of Literaturementioning

confidence: 99%

“…However, the drag coefficient and Nusselt number were far more influenced by other parameters like Re and β than by γ. In a recent investigation, Bijjam et al [23] studied the forced convection from an asymmetrically confined cylinder for Re = 1-40, γ = 0.375-1, β = 0.2-0.5 and Pr = 1-50. They found that asymmetrical configuration reduces overall drag, and that the Nusselt number is higher for symmetric cylinder placement than for asymmetric placement.…”

Section: Current Status Of Literaturementioning

confidence: 99%

“…• At the outlet plane (x = 40): the outflow setting in Ansys Fluent is used, which is a homogeneous Neumann condition for all dependent variables [8,23],…”

Section: Problem Statement and Numerical Detailsmentioning

confidence: 99%

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Cross-buoyancy mixed convection from a heated cylinder placed asymmetrically in a channel

Dhiman

Gupta

Baranyi

2018

International Communications in Heat and Mass Transfer

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Mixed convection heat transfer from a heated circular cylinder asymmetrically placed in a horizontal channel was studied for incompressible Newtonian fluid. A systematic investigation using two-dimensional numerical simulation (Ansys Fluent) was performed for the following control parameters: Reynolds number Re = 50, 100, 150, Richardson number Ri = 0, 1, 2, blockage ratio β = 0.2, 0.3, 0.4, gap ratio γ = 0.25, 0.5, 1 and Prandtl number of air Pr = 0.7. Upon changing these parameters, steady and time periodic regimes were identified. The strongest influence on heat transfer (average Nusselt number) was identified when changing the Reynolds number (a 94% increase between the minimum and maximum Re investigated, with other parameters held constant), followed by Richardson number (+18%) and blockage ratio (+16%); the effect of asymmetric placement (γ) was almost negligible (+1%). The time-mean of the drag coefficient was most influenced by blockage ratio (a 150% increase), followed by Richardson number (+91%), gap ratio (+19%), and Re (+10%).

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Section: Selection Of Numerical Parameterssupporting

confidence: 92%

Section: Current Status Of Literaturementioning

confidence: 99%

Section: Current Status Of Literaturementioning

confidence: 99%

“…• At the outlet plane (x = 40): the outflow setting in Ansys Fluent is used, which is a homogeneous Neumann condition for all dependent variables [8,23],…”

Section: Problem Statement and Numerical Detailsmentioning

confidence: 99%

See 2 more Smart Citations

Cross-buoyancy mixed convection from a heated cylinder placed asymmetrically in a channel

Dhiman

Gupta

Baranyi

2018

International Communications in Heat and Mass Transfer

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“…Kumar et al [14] numerically studied the forced convection of power-law fluid around the semicircular cylinder. Bijjam et al [15] investigated an asymmetrically confined heated cylinder in a channel and found that the Colburn heat transfer factor for the symmetric case was more than the asymmetric one. In addition, they observed that the Prandtl number rather than the placement of cylinder has more effect on the heat transfer enhancement.…”

Section: Introductionmentioning

confidence: 99%

Effect of cylinder geometry on the heat transfer enhancement of power-law fluid flow inside a channel

Sadeghi

Izadpanah

Rabiee

et al. 2016

J Braz. Soc. Mech. Sci. Eng.

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The heat transfer enhancement and pressure drop of non-Newtonian power-law fluid flow due to the presence of a bluff body inside a channel are numerically investigated. Different cross-section geometries such as circular, elliptical, trapezoidal, and inclined square cylinders with the angles of 0°, 15°, 30°, and 45° are studied and compared with straight channel. The results are presented as streamlines, local and average Nusselt number, friction factor and thermo-hydraulic performance for the Reynolds number of 10, 20, and 30, Prandtl number of 100, and power-law index of 0.4, 0.6, 0.8, and 1. The blockage ratio is considered as 0.25 for all the cases. The results show that the thermo-hydraulic performance increases by decreasing the power-law index and the square cylinder with inclined angle of 45° has maximum thermo-hydraulic performance. The effect of the cylinder geometry on the heat transfer enhancement was more than that of the power-law index.

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Effect of an Asymmetrically Confined Rotating Cylinder on Heat Transfer

Gautam,

Thakur,

Thakur

2024

Lecture Notes in Mechanical Engineering

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Laminar momentum and heat transfer phenomena of power-law dilatant fluids around an asymmetrically confined cylinder

Cited by 17 publications

References 28 publications

Cross-buoyancy mixed convection from a heated cylinder placed asymmetrically in a channel

Cross-buoyancy mixed convection from a heated cylinder placed asymmetrically in a channel

Effect of cylinder geometry on the heat transfer enhancement of power-law fluid flow inside a channel

Effect of an Asymmetrically Confined Rotating Cylinder on Heat Transfer

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