Numerical analysis of velocity and temperature fields in concentric annular tube for the laminar forced heat convection

This paper presents a study of the dual reciprocity boundary element method (DRBEM) for the laminar heat convection problem between two coaxial cylinders with constant heat flux boundary condition. DRBEM is one of the most successful technique used to transform the domain integrals arising from the nonhomogeneous term of the Poisson equation into equivalent boundary only integrals. This recently developed and highly efficient numerical method is tested for the solution accuracy of the fluid flow and heat transfer study between two coaxial cylinders. Since their exact solutions are available, DRBEM solutions are verified with different number of boundary element discretiyations and internal points. The results obtained in this study are discussed with the relative error percentage of velocity and temperature solutions, and potential applicability of the method for the more complicated heat convection problems with arbitrary duct geometries. Key-Words: Concentric annular tube, Laminar heat convection, Heat flux boundary condition, Numerical analysis, Dual reciprocity boundary element method.