Abstract
To investigate the influence of the temperature boundary condition of the third kind on the laminar forced convection heat transfer in the thermal entrance region of a rectangular channel, the energy equation is solved by applying the Galerkin-Kantorowich method of variational calculus. Uniform and fully developed velocity profiles are considered. Constant fluid properties are assumed. The heat conduction in flow direction is neglected. It is concluded that there can be a significant influence of Biot number on local Nusselt number. Representative results are tabulated for different aspect ratios.
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