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The problem of laminar, natural convection flow over a vertical frustum of a cone is treated in this paper. The thermal boundary condition at the wall include both the constant wall temperature and the constant wall heat flux cases. The governing differential equations are solved by a combination of quasilinearization and finitedifference methods. Numerical solutions are obtained for a range of Prandtl numbers. The solutions are found to approach to the solutions for a full cone if the flow is far downstream or the radius of the cross-section at the leading edge is very small. circular cylinder by Sparrow and Gregg [12], the boundary layer is 409

A mathematical method to determine the effectiveness of the crossflow heat exchanger accounting for the effect of two-dimensional nonuniform fluid flow distribution is presented. By using a successive substitution technique, the exchanger effectiveness and its deterioration due to the fluid flow nonuniformity effect have been calculated for four typical fluid flow maldistributions. A Flow Nonuniformity Factor has been developed as the principal parameter for predicting the degree of deterioration of the exchanger effectiveness.

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