MHD-Conjugate Free Convection from  an Isothermal Horizontal Circular Cylinder with  Joule Heating and Heat Generation

Azim, Nhm A; Chowdhury, M. K.

doi:10.1155/2013/180516

Cited by 10 publications

(9 citation statements)

References 18 publications

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“…x  The step size of [18], Nazar [22], Molla [24], Azim and Chowdhury [26] and Mohamed [29], who applied the Keller-box method in solving the free convection flow of viscous, micropolar and nanofluid. A proper match among the comparative values of both tables has manifestly validated the present results.…”

Section: Resultsmentioning

confidence: 99%

“…They concluded that for increasing Prandtl number values, the velocity and temperature profiles were both reduced at the lower stagnation region. The combined effects of MHD, joule heating and heat generation were then presented by Azim and Chowdhury [26] on free convection flow of a viscous fluid with convective boundary conditions. With the help of Keller-box method, they noted that the skin friction along the surface of the cylinder decreases with increasing magnetic parameter and conjugate conduction parameter.…”

Section: Introductionmentioning

confidence: 99%

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Flow of Jeffrey Fluid over a Horizontal Circular Cylinder with Suspended Nanoparticles and Viscous Dissipation Effect: Buongiorno Model

Zokri

Arifin

Kasim

et al. 2020

CFDL

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Mathematical model of Jeffrey fluid describes the property of viscoelastic that clarifies the two components of relaxation and retardation times. Nevertheless, the poor thermal performance of Jeffrey fluid has been a key issue facing the public. This issue can be accomplished by the use of nanofluid that has superior thermal performance than the conventional fluids. A better cooling rate in industry is in fact not appropriate to attain by the thermal conductivity of the conventional fluids. On that account, the present study aims to delve into the impact of viscous dissipation and suspended nanoparticles on mixed convection flow of Jeffrey fluid from a horizontal circular cylinder. A concise enlightenment on the separation of boundary layer flow is included and discussed starting from the lower stagnation point flow up to the separation point only. The non-dimensional and non-similarity transformation variables are implemented to transform the dimensional nonlinear partial differential equations (PDEs) into two nonlinear PDEs, and then tackled numerically through the Keller-box method. Representation of tabular and graphical results are executed for velocity and temperature profiles as well as the reduced skin friction coefficient, Nusselt number and Sherwood number to investigate the physical insight of emerging parameters. It was found that the incremented ratio of relaxation to retardation, Deborah number and Eckert number have delayed the boundary layer separation up to 120o

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flow of Jeffrey Fluid over a Horizontal Circular Cylinder with Suspended Nanoparticles and Viscous Dissipation Effect: Buongiorno Model

Zokri

Arifin

Kasim

et al. 2020

CFDL

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“…Natural convection studies with linear heat generation in fluid flow are of significant importance in solving several technological and physical problems. These studies have also attracted a significant research audience (Molla et al, 2006, 2009, Cheng, 2009, Kasim et al, 2011, Azim and Chowdhury, 2013, Zainuddin et al, 2016, Adeniyan et al, 2021, Opadiran, 2021. However, there are limited studies on the natural convection boundary layer flow with constant or inhomogeneous material properties around a horizontal cylinder.…”

Section: Introductionmentioning

confidence: 99%

Importance of convective boundary layer flows with inhomogeneous material properties under linear and quadratic Boussinesq approximations around a horizontal cylinder

Opadiran

Okoya

2021

Heliyon

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This study investigates boundary layer flows with inhomogeneous material properties driven by natural convection using linear and quadratic Boussinesq approximations around a horizontal cylinder. The cylinder's surface was kept at a uniform temperature. The governing equations for the setup were formulated from the principles of mass continuity, momentum and energy under realistic assumptions. Four coupled partial differential equations were obtained and reduced using stream function to two. Using perturbation techniques with one spatial coordinate as the perturbation parameter, the partial differential equations were further reduced to a set of nonlinear coupled ordinary differential equations. The fluid's velocity, as well as the temperature distributions, were computed and analyzed using the Maple 17 platform. The results obtained were consistent with existing results from reference literature. Further analysis of the embedded flow parameters was also carried out and analyzed with relevant tables and graphical illustrations for the linear and quadratic Boussinesq approximations. The results of the study show a fundamental difference between the linear and quadratic Boussinesq approximation alongside an interconnection between constant and variable thermophysical properties.

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“…Many studies have been performed on magnetic field and heat generation effects on magnetohydrodynamic (MHD)-conjugate heat transfer. Azim and Chowdhury [11] investigated MHD-conjugate free convection from an isothermal horizontal circular cylinder with Joule heating and heat generation in the presence of a magnetic field. Azim et al [12] studied the problem of steady CHT through an electrically-conducting fluid for a vertical flat plate with a transverse uniform magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Overlapping Multi-Domain Spectral Method for Conjugate Problems of Conduction and MHD Free Convection Flow of Nanofluids over Flat Plates

Mkhatshwa

Motsa

Sibanda

2019

MCA

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An efficient overlapping multi-domain spectral method is used in the analysis of conjugate problems of heat conduction in solid walls coupled with laminar magnetohydrodynamic (MHD) free convective boundary layer flow of copper (Cu) water and silver (Ag) water nanofluids over vertical and horizontal flat plates. The combined effects of heat generation and thermal radiation on the flow has been analyzed by imposing a magnetic field along the direction of the flow to control the motion of electrically conducting fluid in nanoscale systems. We have assumed that the nanoparticle volume fraction at the wall may be actively controlled. The dimensionless flow equations are solved numerically using an overlapping multi-domain bivariate spectral quasilinearisation method. The effects of relevant parameters on the fluid properties are shown graphically and discussed in detail. Furthermore, the variations of the skin friction coefficient, surface temperature and the rate of heat transfer are shown in graphs and tables. The findings show that the surface temperature is enhanced due to the presence of nanoparticles in the base fluid and the inclusion of the thermal radiation, heat generation and transverse magnetic field in the system. An increase in the nanoparticle volume fraction, heat generation, thermal radiation, and magnetic field parameter enhances the nanofluid velocity and temperature while reducing the heat transfer rate. The results also indicate that the Ag-water nanofluid has higher skin friction and surface temperature than the Cu-water nanofluid, while the opposite behaviour is observed in the case of the rate of heat transfer. The computed numerical results are compared with previously published results and found to be in good agreement.

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MHD-Conjugate Free Convection from an Isothermal Horizontal Circular Cylinder with Joule Heating and Heat Generation

Cited by 10 publications

References 18 publications

Flow of Jeffrey Fluid over a Horizontal Circular Cylinder with Suspended Nanoparticles and Viscous Dissipation Effect: Buongiorno Model

Flow of Jeffrey Fluid over a Horizontal Circular Cylinder with Suspended Nanoparticles and Viscous Dissipation Effect: Buongiorno Model

Importance of convective boundary layer flows with inhomogeneous material properties under linear and quadratic Boussinesq approximations around a horizontal cylinder

Overlapping Multi-Domain Spectral Method for Conjugate Problems of Conduction and MHD Free Convection Flow of Nanofluids over Flat Plates

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