Computational investigations and grid refinement study of 3D transient flow in a cylindrical tank using OpenFOAM

4th AEROTECH- Innovation in Aerospace Engineering and Technology

航空航天工程

Sakri, F. Mohd^1 ; Ali, M.S. Mat^1 ; Salim, S.A.Z. Sheikh^1

Wind Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia^1

关键词: Computational investigation;    Cylindrical tanks;    Grid convergence;    Grid convergence indices (GCI);    Grid sensitivity;    Monotonic convergence;    Richardson extrapolation;    Systematic assessment;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/152/1/012058/pdf
DOI  :  10.1088/1757-899X/152/1/012058

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The study of physic fluid for a liquid draining inside a tank is easily accessible using numerical simulation. However, numerical simulation is expensive when the liquid draining involves the multi-phase problem. Since an accurate numerical simulation can be obtained if a proper method for error estimation is accomplished, this paper provides systematic assessment of error estimation due to grid convergence error using OpenFOAM. OpenFOAM is an open source CFD-toolbox and it is well-known among the researchers and institutions because of its free applications and ready to use. In this study, three types of grid resolution are used: coarse, medium and fine grids. Grid Convergence Index (GCI) is applied to estimate the error due to the grid sensitivity. A monotonic convergence condition is obtained in this study that shows the grid convergence error has been progressively reduced. The fine grid has the GCI value below 1%. The extrapolated value from Richardson Extrapolation is in the range of the GCI obtained.