نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
In this study, the effects of different baffle geometries, including square, triangular, rectangular, and circular, on the flow and heat transfer in a microchannel are investigated. Numerical simulations are performed using ANSYS Fluent. Both Newtonian and non-Newtonian fluids (carboxymethyl cellulose) with concentrations of 1% and 2% are analyzed at a Reynolds number of 200. The results indicate that baffle geometry significantly influences flow separation, vortex formation, and heat transfer. The triangular baffle generates the strongest vortices and the highest Nusselt number, while rectangular and semicircular baffles show less pronounced effects. The square baffle produces stable vortices and achieves a favorable balance between heat transfer enhancement and pressure drop. Increasing the Reynolds number improves the Nusselt number and overall performance. For the 2% non-Newtonian fluid, the performance index exceeds unity for all geometries, indicating enhanced thermo-hydraulic efficiency. Overall, the triangular baffle achieves the highest heat transfer, whereas the square baffle provides the best overall performance.
کلیدواژهها English
