Grid Convergence Study for Detached-Eddy Simulation of Flow over Rod-Airfoil Configuration Using OpenFOAM

4th International Conference on Mechanical and Aeronautical Engineering

机械制造;航空航天工程

Lizarose Samion, Siti Ruhliah^1 ; Shaharuddin, Nur Haziqah^1 ; Mat Ali, Mohamed Sukri^1

Malaysia-Japan International Institute of Technology, University of Technology Malaysia, Kuala Lumpur

54100, Malaysia^1

关键词: Airfoil configuration;    Detached eddy simulations;    Grid convergence;    Grid convergence indices (GCI);    Grid resolution;    Monotonic convergence;    Richardson extrapolation;    Turbulence interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/491/1/012023/pdf
DOI  :  10.1088/1757-899X/491/1/012023

学科分类：航空航天科学

来源: IOP

【 摘 要 】

A rod-airfoil is a benchmark configuration for simulating Airfoil-Turbulence Interaction Noise (ATIN). The numerical simulation is modelled using unsteady Detached Eddy Simulation (DES). The grid refinement involves two stages of assessments. The first compares the sensitivity of two reasonable estimated cells to the flow behaviours of the case. Based on the finding from the first stage, further grid refinement is proceed in stage two. In stage two, a minimum of three different grid resolutions are considered; the fine, medium and coarse grids in order to investigate the grid independency. Richardson extrapolation and Grid Convergence Index (GCI) are introduced to quantitatively evaluate the grid independency. Based on the results between those three different grids, a monotonic convergence criterion has been achieved. The reduction in GCI value indicates that the grid convergence error has been significantly reduced, in which the fine grid has a GCI value is around less than 0.5%.