Assessment of 3D corrugated pipes thermal turbulent flow characteristics and enhancement of hydrodynamic performance based on correlation development

In this study, to determine the behaviour of thermo-hydraulic turbulent flow, heat augmentation, and thermal performance of corrugated pipes, a numerical simulation approach was employed. These calculations were performed using numerical methods. The thermal flow patterns, drop in pressure, friction, Nu, Nu ratios, and corrugated friction factor tube compared to traditional tube were predicted with varying geometrical corrugated configurations with varying conditions and Re from 4000 to 12000. Three geometric corrugations were varied: diameter corrugated ring (DRC), angle corrugated ring (ACR), and ring corrugated distance (RCD). The numerical results compared to the experimental work also showed that the pressure loss increased significantly with the number of corrugated shapes. At Re 12000, Nu for all RCD designs were almost 32.5, 40.7, and 45.8% higher, respectively, than those for the traditional tube. Compared to the traditional pipe, Nu at the ACR parameters was 17.8, 29.7, and 50% higher. The Nu values were approximately 50.1, 46.6, and 41% higher with the DRC arrangement. Furthermore, the results show that an optimal performance evaluation factor (PEF) of up to 1.6. Regression analysis, using response surface methodology in the Minitab technique for varying the above geometrical configurations, was applied to create a variety of correlation equations. These correlations have average errors ranging from 5 to 7%.