Unsteady free convection flow in the stagnation-point region of a rotating sphere embedded in a porous medium

• Autorzy: Hassanien I. A. , Ibrahim F. S. , Omer G. M.
• Języki publikacji: EN

Abstrakty

EN

The problem of the unsteady free convection flow in a fluid saturated porous medium of a rotating sphere in the presence of a solid matrix exerting first and second resistance is studied. Numerical solutions are obtained for the cases of constant wall temperature (CWT) and constant heat flux (CHF). The non-linear coupled partial differential equations governing the flow have been solved numerically using finite difference. The effects of the first resistance parameter ξ, the buoyancy parameter λ, the Prandtl number Pr, the variation of the angular velocity with time (ε > 0) on the skin friction and heat transfer rate ue discussed, is shown the figures. It is found that the buoyancy force enhanced both the skin fraction and the heat transfer rate. The effect of the presence of the first resistance decreases the skin friction and the heat transfer rate.

Słowa kluczowe

EN

convection; saturated medium; buoyancy

PL

konwekcja; podłoże nasycone; wypór hydrostatyczny

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2004
• Tom: Vol. 7, nr 2
• Strony: 89--98
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Hassanien I. A.

autor

Ibrahim F. S.

autor

Omer G. M.

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

Bibliografia

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