This study represents numerical simulations of turbulent fluid flow and heat transfer in a rectangular channel equipped with baffles at different geometric orientations. The baffles are positioned in two arrangements: first case on the bottom wall only second case on the bottom and top walls respectively in tandem condition and always normal to the flow direction in each case. The present investigation is focussed to predict the recirculation bubble, reattachment lengths and widths of the separated shear layers, skin friction coefficient and surface Nusselt number etc. in the turbulent flows. The findings are relevant to the general and industrial applications of the flow through a duct with baffles arranged in different orientation. The flow characteristics include path lines, turbulent kinetic energy, velocity vectors, skin friction coefficient, surface Nusselt number etc. These are analysed using the finite volume method with the power-law scheme of S. V. Patankar. The standard turbulence model with standard wall functions was employed and the SIMPLER algorithm was used for solving pressure-velocity coupling. Simulations were conducted using the commercial ANSYS software along with own code developed. Results indicate that the baffle orientations significantly impact boundary layer separation, recirculation zones and overall thermal performance respectively
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