Numerical simulation of turbulent oscillating flow in porous media
نویسندگان
1 - Department of Mechanical Engineering, Tarbiat Modares University, Tehran, P.O. Box 14115-143, Iran. - Department of Mechanical Engineering, University of Mazandaran, Babolsar, P.O. Box 47416-13534, Iran.
2 Department of Mechanical Engineering, Tarbiat Modares University, Tehran, P.O. Box 14115-143, Iran
doi
10.24200/sci.2020.52521.2788چکیده
Two macroscopic turbulent models, P-dL and N-K, have been proposed in recent years for simulating turbulent unidirectional flow in porous media. In this paper a modification on N-K model has been proposed for turbulent oscillating flow in porous media. To this purpose, Turbulent oscillating flow in porous media has been simulated in microscale employing a periodic array. The k-ε model was applied to solve turbulent oscillating flow in periodic array. Control volume approach has been used to discretize Navier-Stokes and k-ε equations and the well-established SIMPLE method has been conducted to deal with pressure and velocity coupling. To modify N-K model the effect of different parameters such as frequency and Reynolds number has been investigated and the constants in source terms of turbulent kinetic energy and its dissipation rate has been modified versus Re according to microscale results. In order to validate the new modified constants, the modified N-K model was applied to turbulent oscillating flow in porous media and results were compared to original N-K macroscopic model.
