Entropy generation of radiation effect on laminar-mixed convection along a wavy surface

Chen, Cha'o. Kuang; Yang, Yue Tzu; Chang, Kai-Han

doi:10.1007/s00231-010-0724-1

Cited by 16 publications

(4 citation statements)

References 37 publications

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“…It is noticeable that the nanoparticle parameter enhances the aggregated composite thermal conductivity. The thermal radiative flux when the medium of the flow is a porous was examined in various experimental and theoretical studies [26][27][28][29][30][31][32][33][34][35][36][37][38][39]. In these studies, wavy surfaces, semi-infinite vertical plate, stretching sheets and disks are used as boundaries of the flow domain.…”

Section: Introductionmentioning

confidence: 99%

The additive effects of various convection flows saturated in porous media using Cu–water nanofluid: entropy analysis

Raizah¹,

Mansour²,

Ahmed³

2020

Phys. Scr.

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The current simulations treat impacts of the thermal radiation on some natural convective process and entropy generation along a vertical surface impeded in a non-Darcy porous medium. Various convective practicabilities are due to various thermal boundary conditions, namely, isothermal surface with horizontal leading edge C1, uniform surface with horizontal leading edge C2, an adiabatic surface with a concentrated heat source along the horizontal leading edge C3 and a plane plume rising from a horizontal thermal source C4. Beside the boundary conditions, these convection modes are characteristic with a power index such that refers to C1, refers to C2 and refers to C3 and C4. The worked mixture is Cu-water nanofluid. The dependent variables are expanded in terms of small parameters and those are function in the permeability parameter. Numerical imitations are carried out for several of the radiation parameter concentration of the nanoparticles and the porosity of the porous medium The outcomes disclosed that, for all the considered cases, profiles of the temperature, velocity, Bejan number and entropy are enhanced as the radiation parameter is increased. In C1 (isothermal case) the zero-order of the skin friction and the Nusselt coefficient are augmented as is varied. In the same context, in C1, the growing in the radiation coefficient from 0 to 2 results in an increase in the zero-order of the skin friction by 9.4%.

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Section: Introductionmentioning

confidence: 99%

The additive effects of various convection flows saturated in porous media using Cu–water nanofluid: entropy analysis

Raizah¹,

Mansour²,

Ahmed³

2020

Phys. Scr.

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“…Narayana et al [26] investigated effects of double diffusive on a horizontal wavy plate in porous medium. We found two investigations; Chen et al [27] and Chen et al [28] who examined entropy production in two different flow situations over a wavy plate under the influence of thermal radiation effects. They concluded that the increase in thermal radiation results in increase of entropy.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the entropy generation due to heat transfer is more prominent for wavy surface. Readers are referred to some other interesting investigations on heat transfer through wavy surface [28][29][30][31][32][33][34][35]. A literature survey immediately reveals that the entropy analysis of convective heat transfer phenomena is limited to self-similar flows and no attention has been given to the non-similar flows.…”

Section: Introductionmentioning

confidence: 99%

Entropy analysis in moving wavy surface boundary-layer

et al. 2019

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It is a well-established fact that significant gain in the heat transfer rate can be obtained by altering that flat surface texture of the working body. The most convenient alteration, in view of mathematical handling, is the wavy one. Existing studies reveal that the convective heat transfer phenomenon is affected significantly due to the presence of a solid wavy surface. How does the phenomena of entropy generation is effected due to a wavy surface is the question investigated in this manuscript. The expressions for irreversibility distribution rate, Bejan number, and volumetric entropy generation number have been evaluated by Keller-Box method. The effect of important parameters of interest, such as wavy amplitude, Prandtl number, and group parameter on irreversibility distribution rate, Bejan number and entropy generation number, have been discussed in detail. The study reveals that entropy generation number decreases and irreversibility rate increases by increasing the amplitude of the wavy surface.

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“…Radiation effects on convection gained importance in the context of many industrial applications involving high temperatures such as gas turbines, nuclear power plant, and various propulsion engines for aircraft, missiles, satellites, and space technology. Chen et al [19] studied the effects of thermal radiation on laminar forced and free convection along a wavy surface. Chamkha et al [20] presented the nonsimilar solution of steady mixed convection of a nanofluid in the presence of thermal radiation.…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection over an Inclined Wavy Surface in a Nanofluid Saturated Non-Darcy Porous Medium with Radiation Effect

Srinivasacharya

Kumar

2015

International Journal of Chemical Engineering

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The problem of mixed convection in a nanofluid along an inclined wavy surface embedded in a non-Darcy porous medium with radiation effect is analyzed. Coordinate transformation is employed to transform the complex wavy surface to a smooth surface. The governing equations are transformed into a set of ordinary differential equations using the appropriate similarity transformation and then solved using the successive linearization method. The present results are compared with previously published work and are found to be in very good agreement. The effect of pertinent parameters on the nondimensional velocity, temperature, nanoparticle volume fraction, heat, and nanoparticle mass transfer rates is studied and presented graphically.

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Entropy generation of radiation effect on laminar-mixed convection along a wavy surface

Cited by 16 publications

References 37 publications

The additive effects of various convection flows saturated in porous media using Cu–water nanofluid: entropy analysis

The additive effects of various convection flows saturated in porous media using Cu–water nanofluid: entropy analysis

Entropy analysis in moving wavy surface boundary-layer

Mixed Convection over an Inclined Wavy Surface in a Nanofluid Saturated Non-Darcy Porous Medium with Radiation Effect

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