Second law analysis for optimal thermal design of radial fin geometry by convection

Taufiq, B.N.; Masjuki, H.H.; Mahlia, T.M.I.; Saidur, R.; Faizul, Mohamad; Mohamad, Edzrol Niza

doi:10.1016/j.applthermaleng.2006.10.024

Cited by 40 publications

(18 citation statements)

References 13 publications

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“…Perhaps such interest has been instilled by frequent encounters of fin problems in many engineering applications to enhance heat transfer. In recent years many authors have been interested in the steady-state problems [2][3][4][5][6][7][8][9][10][11] describing heat flow in fins of different shapes and profiles. Exact solutions exist when both the thermal conductivity and heat transfer coefficients are constant [2], and even when they are not constant provided thermal conductivity is a differential consequence of the heat transfer coefficient [5,6].…”

Section: Introductionmentioning

confidence: 99%

Transient heat transfer in longitudinal fins of various profiles with temperature-dependent thermal conductivity and heat transfer coefficient

Moitsheki

Harley

2011

Pramana - J Phys

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Transient heat transfer through a longitudinal fin of various profiles is studied. The thermal conductivity and heat transfer coefficients are assumed to be temperature dependent. The resulting partial differential equation is highly nonlinear. Classical Lie point symmetry methods are employed and some reductions are performed. Since the governing boundary value problem is not invariant under any Lie point symmetry, we solve the original partial differential equation numerically. The effects of realistic fin parameters such as the thermogeometric fin parameter and the exponent of the heat transfer coefficient on the temperature distribution are studied.

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Section: Introductionmentioning

confidence: 99%

Transient heat transfer in longitudinal fins of various profiles with temperature-dependent thermal conductivity and heat transfer coefficient

Moitsheki

Harley

2011

Pramana - J Phys

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“…The general equation for the entropy generation per unit volume is given by [12][13][14][15][16][17][18][19][20][21][22][23];…”

Section: Entropy Analysismentioning

confidence: 99%

“…The study of entropy generation in conductive and convective heat transfer processes has assumed considerable importance since the pioneering work of Bejan [14] and his subsequent book on the subject [15]. Many entropy generation studies on flows with heat transfer can be found in the literature [16][17][18][19][20]. Sahin [21] analyzed the variation of entropy generation in the function of viscosity in forced flow.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic second law analysis for a gravity-driven variable viscosity liquid film along an inclined heated plate with convective cooling

Makinde

2010

J Mech Sci Technol

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The inherent irreversibility and thermal stability in a gravity-driven temperature-dependent variable viscosity thin liquid film along an inclined heated plate with convective cooling is investigated. In this study, both the isothermal and isoflux heating of the plate are considered. The free surface of the liquid film is assumed to exchange heat with the surroundings following Newton's cooling law and the fluid viscosity model varies as an inverse linear function of the temperature. Analytical solutions are constructed for the governing boundaryvalue problem, and important properties of velocity and temperature fields such as thermal stability criterion are obtained. Expressions for volumetric entropy generation numbers, irreversibility distribution ratio, and the Bejan number in the flow field are also obtained and discussed quantitatively.

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“…As expected, the presence of contact resistance and the convection resistances at the two ends of the fin significantly impacts the thermal performance of the fin. The second law based optimum design of an annular fin has been reported by Taufiq et al [22]. Their analysis included the entropy generation due to heat transfer as well as entropy generation due to fluid friction associated with the external flow over the surface of the fin.…”

Section: Introductionmentioning

confidence: 97%

Numerical investigation for a hyperbolic annular fin with temperature dependent thermal conductivity

Darvishi

Khani

Aziz

2016

Propulsion and Power Research

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An annular fin of hyperbolic profile with temperature dependent thermal conductivity is studied by pseudospectral method. Graphs illustrating the effect of fin dimensions, surface convection characteristics and the thermal conductivity parameter on the thermal performance of the fin are presented and discussed. A comparison of the obtained numerical results is made with the closed form analytical solution available in the literature for the case of constant thermal conductivity. This comparison confirms the high accuracy of numerical results. When the thermal conductivity increases with temperature, the effect is to elevate both the temperature distribution in the fin and the fin efficiency. The converse is true when the thermal conductivity decreases with temperature.

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Second law analysis for optimal thermal design of radial fin geometry by convection

Cited by 40 publications

References 13 publications

Transient heat transfer in longitudinal fins of various profiles with temperature-dependent thermal conductivity and heat transfer coefficient

Transient heat transfer in longitudinal fins of various profiles with temperature-dependent thermal conductivity and heat transfer coefficient

Thermodynamic second law analysis for a gravity-driven variable viscosity liquid film along an inclined heated plate with convective cooling

Numerical investigation for a hyperbolic annular fin with temperature dependent thermal conductivity

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