The paper presents a numerical investigation of forced and mixing convection heat transfer and flow analysis of a passive heat exchanger inside clear (non-porous) and partially porous channels at different outlet area. Four discrete heat sources with uniform heat flux are simulated on the bottom wall of the channel. FORTRAN CFD code was developed and used to solve non-dimensional the governing equations for the fluid and porous media using finite volume method. The flow field and thermal analysis inside the channel are investigated across a wide range of Reynolds number (50 ≤ Re ≤ 300), Darcy number (10−2 ≤ Da ≤ 10−6), Richardson number (0 ≤ Ri ≤ 100) for 0.71 Prandtl number. The results show that the heat exchanger with partially porous convergent channel provides superior heat source cooling which leads to develop the macro and microelectronic devices.

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