Thermal dispersion effects on non-Darcy axisymmetric free convection in a saturated porous medium with lateral mass transfer

• Autorzy: Mansour M. A. , El-Amin M. F.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

porous medium; thermal dispersion; permeable surfaces; axisymmetric flow; free convection

PL

hydromechanika

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: Applied Mechanics and Engineering
• Rocznik: 1999
• Tom: Vol. 4, no 4
• Strony: 727--737
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr.

Twórcy

autor

Mansour M. A.

autor

El-Amin M. F.

• Mathematics Department, Faculty of Science, Assiut University, Assiut, EGYPT