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

Omid Ali Akbari; Hossein Haghjoo; Azher M Abed; Mahsa Karimi; Ali Maghzian; Gholamreza Ahmadi Sheikh Shabani; Amirmasoud Anvari; Nevzat Akkurt; Davood Toghraie

doi:10.1016/j.heliyon.2022.e11901

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

Heliyon. 2022 Nov 30;8(12):e11901. doi: 10.1016/j.heliyon.2022.e11901. eCollection 2022 Dec.

Authors

Omid Ali Akbari¹, Hossein Haghjoo¹, Azher M Abed², Mahsa Karimi³, Ali Maghzian⁴, Gholamreza Ahmadi Sheikh Shabani¹, Amirmasoud Anvari⁵, Nevzat Akkurt⁶, Davood Toghraie¹

Affiliations

¹ Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran.
² Air Conditioning and Refrigeration Techniques Engineering Department, Al-Mustaqbal University College, Babylon 51001, Iraq.
³ Mechanical Engineering Department, University of Kashan, Kashan, Iran.
⁴ Department of Renewable Energies and Environment, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran.
⁵ Department of Mechanical Engineering, Iran university of science and technology, Tehran, Iran.
⁶ Munzur university, Department of Mechanical Engineering 62000 Tunceli, Turkey.

Abstract

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-ω SST, k-ϵ RN, k-ϵ Realizable, k-ϵ Standard, k-ω 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-ω 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.

Keywords: Friction factor; Numerical simulation; Pressure drop; Turbulence models; Turbulent flow; Wavy channel.