Radiation Effect on Mixed Convection over an Isothermal Wedge in Porous Media: The Entire Regime

Yih, K. A.

doi:10.1080/014576301300092540

Cited by 24 publications

(16 citation statements)

References 14 publications

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“…From the figures, we observe that the amplitude of the heat transfer is strongly dependent on the conduction-radiation parameter R d , whereas that of the skin and the mass transfer is almost unaffected by it. Also an increase in the conduction-radiation parameter results in decreasing the amplitude of the heat transfer which validates the findings of Chamkha et al 10 . The reason is that the smaller R d corresponds to an increased dominance of conduction over radiation.…”

Section: Resultssupporting

confidence: 78%

Radiation Effect on Unsteady Mixed Convection Boundary Layer Flow, Heat and Mass Transfer over a Wedge

Roy

Firoza

Halder

2016

Dhaka Univ. J. Sci.

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This paper concerns the unsteady mixed convection laminar boundary layer flow past a vertical wedge in the presence of thermal radiation. The governing equations have been solved by the straightforward finite difference method for the entire frequency range. We observe that the Richardson's number, Ri, strongly affects the skin friction, heat transfer and mass transfer. The effect of the Schmidt number, Sc, on the mass transfer is significant, whereas the skin friction and the heat transfer are almost unaffected by it. Also the heat transfer is considerably dependent on the conduction-radiation parameter, Rd, but the influence of this parameter on the skin friction and the mass transfer is rather weak.

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Section: Resultssupporting

confidence: 78%

Radiation Effect on Unsteady Mixed Convection Boundary Layer Flow, Heat and Mass Transfer over a Wedge

Roy

Firoza

Halder

2016

Dhaka Univ. J. Sci.

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“…However, the thermal radiation effect on mixed convection heat transfer in porous media is very important in high-temperature processes and space technology and has many important applications such as space technology, and processes involving high temperatures such as geothermal engineering, the sensible heat storage bed, the nuclear reactor cooling system and underground nuclear wastes disposal. Yih (1999Yih ( , 2001) studied radiation effect on mixed convection over an isothermal wedge/cone in porous media. Bakier (2001) presented an analysis of the thermal radiation effect on stationary mixed convection from vertical surfaces in saturated porous media.…”

Section: Introductionmentioning

confidence: 99%

Radiation Effects on Mixed Convection over a Wedge Embedded in a Porous Medium Filled with a Nanofluid

et al. 2011

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The problem of steady, laminar, mixed convection boundary-layer flow over an isothermal vertical wedge embedded in a porous medium saturated with a nanofluid is studied, in the presence of thermal radiation. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis with Rosseland diffusion approximation. The wedge surface is maintained at a constant temperature and a constant nanoparticle volume fraction. The resulting governing equations are non-dimensionalized and transformed into a non-similar form and then solved by Keller box method. A comparison is made with the available results in the literature, and our results are in very good agreement with the known results. A parametric study of the physical parameters is made, and a representative set of numerical results for the velocity, temperature, and volume fraction, the local Nusselt and Sherwood numbers are presented graphically. The salient features of the results are analyzed and discussed.

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“…Again, the radiative mode of heat transfer becomes important when the temperature difference between the plate surface and ambient is large. Yih (2001) studied the radiation effect on free convection over a vertical cylinder embedded in porous media. El-Hakiem and Rashad (2007) used the Rosseland diffusion approximation in studying the effect of radiation on free convection from a vertical cylinder embedded in a fluid-saturated porous medium.…”

Section: Introductionmentioning

confidence: 99%

Non-Similar Solutions for Heat and Mass Transfer from a Surface Embedded in a Porous Medium for Two Prescribed Thermal and Solutal Boundary Conditions

Aly¹,

Chamkha²

2010

International Journal of Chemical Reactor Engineering

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This work studies the effects of homogeneous chemical reaction and thermal radiation on coupled heat and mass transfer by free convection from a surface embedded in a fluid-saturated porous medium. Two different cases of thermal and solutal boundary conditions, namely the prescribed surface temperature and concentration (PSTC) case and the prescribed heat and mass fluxes (PHMF) case are considered. The governing boundary-layer equations are formulated and transformed into a set of non-similar equations. The resulting equations are solved numerically by an accurate and efficient implicit finite-difference method. The obtained results compared with previously published work and found to be in excellent agreement. A representative set of results is displayed graphically to illustrate the influence of the radiation parameter, chemical reaction parameter and the permeability of the porous medium on the velocity, temperature and concentration fields as well as the local skin-friction coefficient, local Nusselt number and the local Sherwood number.

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Radiation Effect on Mixed Convection over an Isothermal Wedge in Porous Media: The Entire Regime

Cited by 24 publications

References 14 publications

Radiation Effect on Unsteady Mixed Convection Boundary Layer Flow, Heat and Mass Transfer over a Wedge

Radiation Effect on Unsteady Mixed Convection Boundary Layer Flow, Heat and Mass Transfer over a Wedge

Radiation Effects on Mixed Convection over a Wedge Embedded in a Porous Medium Filled with a Nanofluid

Non-Similar Solutions for Heat and Mass Transfer from a Surface Embedded in a Porous Medium for Two Prescribed Thermal and Solutal Boundary Conditions

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