Buoyancy and wall conduction effects on forced convection of micropolar fluid flow along a vertical slender hollow circular cylinder

Chang, Chun

doi:10.1016/j.ijheatmasstransfer.2006.05.037

Cited by 37 publications

(45 citation statements)

References 31 publications

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“…Similar observations have been recorded by a number of researchers including Chen and Leonard (1972) for power-law fluids, Chang (2006) for micro polar fluids and Anwar et al (2008) for viscoelastic fluids.…”

Section: Resultssupporting

confidence: 87%

Numerical Study of Non-Newtonian Polymeric Boundary Layer Flow and Heat Transfer From a Permeable Horizontal Isothermal Cylinder

Rao¹,

Prasad²,

Rajendra³

et al. 2017

Frontiers in Heat and Mass Transfer

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In this article, we investigate the nonlinear steady state boundary layer flow and heat transfer of an incompressible Jeffery non-Newtonian fluid from a permeable horizontal isothermal cylinder. The transformed conservation equations are solved numerically subject to physically appropriate boundary conditions using a versatile, implicit, finite-difference technique. The numerical code is validated with previous studies. The influence of a number of emerging non-dimensional parameters, namely with Deborah number (De), surface suction parameter (S), Prandtl number (Pr), ratio of relaxation to retardation times (λ) and dimensionless tangential coordinate (ξ) on velocity and temperature evolution in the boundary layer regime are examined in detail. Furthermore, the effects of these parameters on surface heat transfer rate and local skin friction are also investigated. It is found that the velocity is reduced with increasing Deborah number whereas temperature is enhanced. Increasing λ enhances the velocity but reduces the temperature. The heat transfer rates is found to be depressed with increasing Deborah number, De, and enhanced with increasing λ. Local skin friction is found to be decreased with a rise in Deborah number whereas it is elevated with increasing values of relaxation to retardation time ratio (λ). Increasing suction decelerates the flow and cools the boundary layer i.e. reduces temperatures. With increasing tangential coordinate, the flow is also decelerated whereas the temperatures are enhanced. The simulation is relevant to polymer coating thermal processing. Polymeric enrobing flows are important in industrial manufacturing technology and process systems. Such flows are non-Newtonian. Motivated by such applications, we did the present problem.

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Section: Resultssupporting

confidence: 87%

Numerical Study of Non-Newtonian Polymeric Boundary Layer Flow and Heat Transfer From a Permeable Horizontal Isothermal Cylinder

Rao¹,

Prasad²,

Rajendra³

et al. 2017

Frontiers in Heat and Mass Transfer

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show abstract

“…For Ri = 0.0, Mn = 0.0 and E 1 = 0.0, we compare our Àh 0 (n, 0) results at with those given by Chen and Mucoglu [2] and Chang [7] ( Table 1). The comparison is found to be in good agreement, as shown in Table 1.…”

Section: Numerical Solutionmentioning

confidence: 83%

“…Kumari and Nath [6] studied the effects of localized cooling/heating and injection/suction on the mixed convection flow on a thin vertical cylinder. Chang [7] numerically investigated of the flow and heat transfer characteristics of free convection in a micropolar fluid flowing along a vertical slender hollow circular cylinder with conduction effects. Roy et al [8] developed general analysis for the influence of non-uniform double slot injection (suction) on the steady non-similar incompressible laminar boundary layer flow over a slender cylinder.…”

Section: Introductionmentioning

confidence: 99%

MHD-mixed convection from a vertical slender cylinder

Aydın¹,

Kaya²

2011

Communications in Nonlinear Science and Numerical Simulation

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“…The step sizes employed were arrived at after performing numerical experimentations to assess grid independence and ensure accuracy of the results. The accuracy of the aforementioned numerical method is validated by direct comparisons with the numerical results reported earlier by Chang (2006) and Aydin and Kaya (2011) for the case of forced convection flow about a vertical cylinder (Ri=0) for regular fluid (Rb=Pe=Nb=Nt=0) in the absence of the mass transfer (Nr=0) as given in Table 1. It can be seen from this table that excellent agreement between the results exists.…”

Section: Methodsmentioning

confidence: 93%

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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Buoyancy and wall conduction effects on forced convection of micropolar fluid flow along a vertical slender hollow circular cylinder

Cited by 37 publications

References 31 publications

Numerical Study of Non-Newtonian Polymeric Boundary Layer Flow and Heat Transfer From a Permeable Horizontal Isothermal Cylinder

Numerical Study of Non-Newtonian Polymeric Boundary Layer Flow and Heat Transfer From a Permeable Horizontal Isothermal Cylinder

MHD-mixed convection from a vertical slender cylinder

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

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