Numerical investigation the hydrodynamic parameters of the flow in a wavy corrugated channel using different turbulence models

In this research, turbulent flow numerical models in a wavy channel were investigated. The studied channel is simulated in two dimensions and symmetrically in the range of Reynolds numbers from Re= 10,000 to 80,000. The significant cause of this research is to investigate and determine the appropriate method for estimating the behavior of turbulent flow in a wavy channel. In this research, the behavior of turbulent flow in a wavy channel will be simulated in 7 different ways, which are k-omega SST, k-epsilon RN, k-epsilon Realizable, k-epsilon Standard, k-omega Standard, Reynolds stress and Spalart-Allmaras. The findings of this research show that the impacts of the presence of flow viscosity (friction) and the presence of adverse pressure gradients are factors that strongly affect the velocity profiles in the upstream areas of the corrugated section. Among the studied models, due to better compatibility and guessing of flow and hydrodynamic properties, k-omega SST methods and Reynolds and Spalart-Allmaras stress are introduced as the best methods for such geometries. On the other hand, increasing the accuracy of other turbulence methods is related to the flow physics and geometric structure of each problem. In this research, the hydrodynamic parameters of the flow such as pressure drop, skin friction factor, and dynamic pressure drop coefficient and vortex contours, and pressure are plotted and described.

Automated summary

In this research, turbulent flow numerical models in a wavy channel were investigated to determine the appropriate method for estimating the behavior of turbulent flow in such geometries. Among the studied models, the k-omega SST methods and Reynolds and Spalart-Allmaras stress are introduced as the best methods due to their better compatibility and guessing of flow and hydrodynamic properties.