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Abstrakty
An analysis is presented to study the effects of thermal dispersion and lateral mass flux on non-Darcy axisymmetric free convection on permeable horizontal surfaces in a fluid saturated porous medium. The thermal diffusivity coefficient has been assumed to be the sum of the molecular diffusivity and the dynamic diffusivity due to mechanical dispersion. Similarity solutions are obtained when the surface temperature varies as the square root of the radial distance or when heat flux is constant. The effects of the dispersion, lateral mass flux and non-Darcy parameters on the velocity and temperature are shown on graphs. The numerical values of the rate of heat transfer as well as the total energy convected through the boundary layer are entered in tables.
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Rocznik
Tom
Strony
727--737
Opis fizyczny
Bibliogr. 8 poz., tab., wykr.
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autor
autor
- Mathematics Department, Faculty of Science, Assiut University, Assiut, EGYPT
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Bibliografia
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bwmeta1.element.baztech-article-BPZ2-0011-0040