When a fluid flows past an array of cylinders that represent the porous media, the micro convection around the cylinders will contribute to heat dispersion. The modified effective thermal conductivity tensor that includes the microscopic heat dispersion effect is usually calculated by a volume averaging method. This method requires a closure constitutive vector b to simulate the modified effective thermal conductivity tensor. In this paper, a direct temperature solution method to calculate the modified effective thermal conductivity tensor, by solving the temperature field in a unit cell with appropriate boundary conditions ,is proposed.
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