Numerical analysis of the effect of arrangement of fin on flow field and heat transfer enhancement of a non-Newtonian nanofluid in a corrugated channel

In the present study, heat transfer enhancement of a non-Newtonian nanofluid by different arrangements of double fins in a corrugated channel was numerically investigated. Finite volume method is used to solve governing equations of flow and energy with assumptions of 2D, steady-state, and single phase. The fluid flow is in the hydraulically laminar regime and the channel is under a constant heat flux. A set of case studies are conducted for a corrugated channel model to analyze the influence of the main contributing factors; Reynolds number, nanofluid volume fraction, the different fin configurations, on the flow field and the heat transfer characteristics as well. . Results indicate that using non-Newtonian fluid of water+0.5%CMC instead of water fluid leads to enhance heat transfer. The numerical results showed that implementing configuration D in a corrugated channel leads to heat transfer rate compared to other configurations. Besides, for configuration D, raising the Reynolds number from 200 to 1000 and the nanofluid volume fraction from 0.5% to 1.5% cause the mean Nusselt number and performance evaluation index to increase about 9.85% and 9.09%, respectively.