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Natural convection on a thin vertical cylinder moving in a high-porosity ambient medium

Takhar, Harmindar S. and Chamkha, Ali J. and Nath, Girishwar (2003) Natural convection on a thin vertical cylinder moving in a high-porosity ambient medium. International journal of engineering science, 41 (16). pp. 1935-1950. ISSN 0020-7225

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Abstract

An analysis has been performed to study the natural convection flow over a thin vertical cylinder which is moving with a constant velocity in a non-Darcy high-porosity ambient medium. Both constant wall temperature and constant heat flux conditions have been considered. The coupled non-linear parabolic partial differential equations have been solved numerically by using an implicit finite-difference scheme. The heat transfer is found to be significantly affected by the inertia and porosity parameters, and the Prandtl number, whereas the skin friction is weakly affected. The heat transfer for the constant heat flux case is more than that of the constant wall temperature case and this difference increases with the Prandtl number. The heat transfer increases with the buoyancy force, but the skin friction is slightly reduced.

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