Effect of Thermal Radiation on Non-Darcy Natural Convection From a Vertical Cylinder Embedded in a Nanofluid Porous Media

El-Kabeir, S. M. M.; Chamkha, Ali J.; Rashad, A. M.

doi:10.1615/jpormedia.v17.i3.70

Cited by 46 publications

(23 citation statements)

References 21 publications

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“…Mabood et al [18] analyzed the nanofluid forced convective flow across a circular cylinder. However, various attempts have been established about the use of nanofluids to enhance heat transfer [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Mixed Convective Flow of Micropolar Nanofluid across a Horizontal Cylinder in Saturated Porous Medium

et al. 2019

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The micropolar nanofluids are the potential liquids that enhance the thermophysical features and ability of heat transportation instead of base liquids. Alumina and Titania nanoparticles are mixed in a micropolar fluid. The impact of convective boundary condition is also examined with assisting and opposing flows of both nanofluids. The main objective of this study is to investigate mixed convective flow and heat transfer of micropolar nanofluids across a cylinder in a saturated porous medium. Non-similar variables are used to make the governing equations dimensionless. The local similar and non-similar solutions are obtained by using the Runge-Kutta-Fehlberg method of seventh order. The impacts of various embedded variables on the flow and heat transfer of micropolar nanofluids are investigated and interpreted graphically. It is demonstrated that the skin friction and heat transfer rates depend on solid volume fraction of nanoparticles, Biot number, mixed convection, and material parameters.

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Section: Introductionmentioning

confidence: 99%

Mixed Convective Flow of Micropolar Nanofluid across a Horizontal Cylinder in Saturated Porous Medium

et al. 2019

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“…Choi [27] has also reported another model that examined various conventional fluids to examine the thermal conductivity of fluids with nanoparticle properties, and another is a model proposed by Tiwari and Das [28]. EL-Kabeir and co-authors [29,30] reported a theoretical analysis of the flow and heat transfer in a nanofluid. Rashad [31,32] investigated the impact of thermal MHD slip flow of a nanofluid over a nonisothermal wedge and an inclined stretching surface, respectively.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Investigation of Fe3O4–Water Nanofluid Flow over a Moveable Plane in a Parallel Stream with High Suction

et al. 2019

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In the current framework, a model is constituted to explore the impacts of high suction and partial slip on Fe3O4–water nanoliquid flow over a porous moveable surface in a parallel free stream. The mechanisms of heat transfer are also modeled in the existence of Newtonian heating effect. The obtaining PDEs are transformed into a non-linear ODE system employing appropriate boundary conditions to diverse physical parameters. The governing ODE system is solved using a singular perturbation technique that results in an analytical asymptotic solution as a function of the physical parameters. The obtained solution allows us to carry out an analytical parametric study to investigate the impact of the physical parameters on the nonlinear attitude of the system. The precision of the proposed method is verified by comparisons between the numerical and analytical results. The results confirm that the proposed technique yields a good approximation to the solution as well as the solution calculation has no CPU time-consuming or round off error. Numerical solutions are computed and clarified in graphs for the model embedded parameters. Moreover, profiles of the skin friction coefficient and the heat transfer rate are also portrayed and deliberated. The data manifests that both solid volume fraction and slip impact significantly alter the flow profiles. Moreover, an upward trend in temperature is anticipated for enhancing Newtonian heating strength. Additionally, it was found that both the nanofluid velocity and temperature distributions are decelerated when the solid volume fraction and suction parameters increase. Furthermore, a rise in slip parameter causes an increment in velocity profiles, and a rise in Biot number causes an increment in the temperature profiles.

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“…Email: mallikarjuna.jntua@gmail.com, mallikarjunab.maths@bmsce.ac.in natural convection flow of a nanofluid and heat transfer from a moving vertical cylinder. EL-Kabeir et al (2014) have discussed theoretically the non-Darcy free natural convection flow of nanofluid with heat transfer from a vertical cylinder saturated a porous medium. Dinarv et al (2015) have reported the mixed convection boundary layer flow of a nanofluid over a vertical circular cylinder with prescribed external flow.…”

Section: Introductionmentioning

confidence: 99%

Mixed Bioconvection Flow of a Nanofluid Containing Gyrotactic Microorganisms Past a Vertical Slender Cylinder

Mallikarjuna¹,

Rashad²,

Chamkha³

et al. 2018

Frontiers in Heat and Mass Transfer

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ABSTRACTin this paper, the steady mixed bioconvection flow of a nanofluid containing gyrotactic microorganisms past a vertical slender cylinder is studied. The passively controlled nanofluid model is applied to approximate this nano-bioconvection flow problem, which is believed to be physically more realistic than previously commonly used actively controlled nanofluid models. Using a suitable transformation, the nonlinear system of partial differential equations is converted into non-similar equations. These resulting equations are solved numerically using an accurate implicit finitedifference method. The present numerical results are compared with available data and are found in an excellent agreement. The skin friction coefficient, local Nusselt number, and the local density of the motile microorganism profiles are examined subject to various parameters of interest, namely Richardson number, thermophoresis parameter, Brownian motion parameter, bio-convection Lewis number, bio-convection Rayleigh number, and bioconvection Péclet number for various values of surface transverse curvature parameter. The results indicate that the skin friction coefficient, local Nusselt number, and the local density of the motile microorganisms enhance with a decrease in either of the bioconvection Péclet number or the thermophoresis parameter and with an increase in either of the Brownian motion parameter, bioconvection Lewis number or the Richardson number. Increasing and decreasing the buoyancy ratio parameter and bioconvection Rayleigh number respectively, lead to increase in the local skin friction coefficient and the local rate of heat transfer and reduction in the local density of motile microorganism. This type of study finds application in engineering, geothermal and industrial fields such as the design of microbial fuel cell and bio-convection nano-technological devices.

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Effect of Thermal Radiation on Non-Darcy Natural Convection From a Vertical Cylinder Embedded in a Nanofluid Porous Media

Cited by 46 publications

References 21 publications

Mixed Convective Flow of Micropolar Nanofluid across a Horizontal Cylinder in Saturated Porous Medium

Mixed Convective Flow of Micropolar Nanofluid across a Horizontal Cylinder in Saturated Porous Medium

Analytical and Numerical Investigation of Fe3O4–Water Nanofluid Flow over a Moveable Plane in a Parallel Stream with High Suction

Mixed Bioconvection Flow of a Nanofluid Containing Gyrotactic Microorganisms Past a Vertical Slender Cylinder

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