Effect of Fluid Rheology on Thermal Hydraulic Features for Flow Through a Triangular Corrugated Duct

We investigate using computational simulation hydraulic and thermal features of non-Newtonian power-law fluid flow through a triangular corrugated duct for Reynolds number in the range of 10 to 100. The study reveals that the augmentation of heat transfer (AHT) in the triangular corrugated duct (TCD) compared to the equivalent flat duct is not important when the amplitude of the triangular corrugated wall is small. However, as the amplitude of TCD increases, a significant AHT is achieved. The enhancement ratio compared to straight channel diminishes with power law index (n), and is particularly evident for shear-thinning fluid and Reynolds number Re = 100. Additionally, the study also evaluates the pressure drop for flow over TCD and the equivalent flat channel. The comparison indicates that the pressure drop ratio \(PR= \frac{{\Delta P}_{w}}{{\Delta P}_{f}}\) is higher than that of the AHT. Using the TCD, one can obtain a better AHT with a minimum PD for shear-thinning fluids.