Effect of aiding buoyancy on heat transfer from an isothermal elliptical cylinder in Newtonian and Bingham plastic fluids

Patel, Swati A.; Chhabra, R.P.

doi:10.1016/j.ijheatmasstransfer.2015.05.066

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…These diffusion are recognized as Soret effect (mass transfer) and Dufour effect (heat transfer). Thus, a lot of research carried out heat and mass transfer analysis, such as in the Newtonian fluid [13][14][15][16], Bingham fluid [17][18][19], Maxwell fluid [20][21][22], Casson fluid [23][24][25], etc. These fluid are bounded by a semi-circular cylinder [14], horizontal sheet [15,16,21,22,24,25], isothermal elliptical cylinder [17], heated rotating disk [18], vertical sheet [19], permeable cylinder [20], and a cylinder in a wavy channel [23].…”

Section: Introductionmentioning

confidence: 99%

Soret-Dufour Effects on Heat and Mass Transfer of Newtonian Fluid Flow over the Inclined Sheet and Magnetic Field

Siti Suzilliana Putri Mohamed Isa,

Hazirah Mohd Azmi,

Nanthini A/P Balakrishnan

et al. 2023

ARNHT

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Newtonian fluid is ideal for lubrication purposes because the viscosity of this fluid remains as a function of the shear. Besides, the heat and mass transfer are an important study area in fluid dynamics due to its vast applications in industrial processes. The heat-mass transfer can be defined as the Soret and Dufour effect, which implemented in many industrial applications such as in chemical engineering and geosciences field. In addition, the fluid flow over an extending/compressing sheet has significant industrial applications such as the cooling of continuous strips, glass fibre production, the extrusion of plastic sheets from a die, etc. As a response, this study aims to investigate the impacts of Soret and Dufour parameters on the Newtonian fluid flow over an inclined stretching/shrinking sheet. The methodology of this mathematical model are stated as follow: 1) the transformation of partial differential equations (PDEs) to the ordinary differential equations (ODEs), and 2) The ODEs are solved using bvp4c solver in MATLAB software. The bvp4c solver is a MATLAB program directory that solves general form and multi-point boundary layer problems. The main sections of bvp4c are: 1) The solution of the ODEs, 2) The related boundary conditions that can produce the expected results, and 3) An initial guess to run the bvp4c solver. As a result, the numerical and graphical results show that the Soret effect increases the concentration profile whereas decreases the temperature profile. The vice versa occurrence is true for Dufour effect. The convective mass transfer caused by a temperature gradient is known as thermal-diffusion (Soret) effect. The convective heat transfer produced by concentration differences is known as diffusion-thermo (Dufour) effect. However, since the process of heat and mass transfers are related to each other, the Soret and Dufour effects are able to influence both of this process simultaneously. In conclusion, the convective heat transfer is enhanced by increasing Soret and Dufour number while the convective mass transfer is declined by increasing the two numbers.

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Section: Introductionmentioning

confidence: 99%

Soret-Dufour Effects on Heat and Mass Transfer of Newtonian Fluid Flow over the Inclined Sheet and Magnetic Field

Siti Suzilliana Putri Mohamed Isa,

Hazirah Mohd Azmi,

Nanthini A/P Balakrishnan

et al. 2023

ARNHT

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“…For Newtonian fluids, there are some recent works on the flow and mixed convection heat transfer from horizontal circular [1][2][3] square [4][5][6][7][8] and others [9] and [10]. Laidoudi and Bouzit [1] investigated numerically 2D confined flow and mixed convection of incompressible fluid from heated cylinder confined in horizontal channel.…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection Heat Transfer from a Heated Square Cylinder Immersed in Upward Flow of Power-Law Fluids

Laidoudi

Bouzit

2018

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This paper examines the effects of thermal buoyancy on momentum and heat transfer characteristics of confined square cylinder submerged in incompressible power-law fluid. The detailed flow and temperature fields are visualized in terms of streamlines and isotherm contours. The numerical results have been presented and discussed for the range of conditions as (10 ≤Re≤ 40), Richardson number (0 ≤Ri≤ 1), and power-law index (0.4 ≤n≤ 1.2) at Prandtl numberPr= 50, at fixed value of blockage ratioβ= 25%. The results showed that the augmentation of the power-law index in the absence of thermal buoyancy causes a separation to diminish for the valueRe= 40. The thermal buoyancy delays the flow separation in different power-law indexes gradually and at some critical value of the buoyancy parameter it completely disappears resulting a creeping flow around a cylinder. Moreover, the recirculation length and skin friction are calculated to support the above finding. The decrease in the power-Law index promotes the heat transfer rate. The Nusselt numbers are computed to predict the heat transfer rates of power-law fluids under the superimposed thermal buoyancy condition.

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Buoyancy-assisted flow of yield stress fluids past a cylinder: Effect of shape and channel confinement

Patel

Chhabra

2019

Applied Mathematical Modelling

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Effect of aiding buoyancy on heat transfer from an isothermal elliptical cylinder in Newtonian and Bingham plastic fluids

Cited by 9 publications

References 41 publications

Soret-Dufour Effects on Heat and Mass Transfer of Newtonian Fluid Flow over the Inclined Sheet and Magnetic Field

Soret-Dufour Effects on Heat and Mass Transfer of Newtonian Fluid Flow over the Inclined Sheet and Magnetic Field

Mixed Convection Heat Transfer from a Heated Square Cylinder Immersed in Upward Flow of Power-Law Fluids

Buoyancy-assisted flow of yield stress fluids past a cylinder: Effect of shape and channel confinement

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