Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
VALIDATION OF 2D AND 3D SUPERSONIC FLOWS SIMULATIONS IN OPENFOAM
Submission Author:
Pedro Henrique Rosa dos Santos , DF
Co-Authors:
Pedro Henrique Rosa dos Santos, Braulio Pimenta
Presenter: Pedro Henrique Rosa dos Santos
doi://10.26678/ABCM.COBEM2019.COB2019-1458
Abstract
The computational Fluid Dynamics helps the design of supersonic jets and the open-source software can show a good relationship between cost and benefit. In this context, the present work aimed to validate the results of OpenFOAM concerning the simulation of supersonic external flows. The methodology consisted of the simulation of 2D and 3D supersonic flows, with or without adaptive mesh refinement (AMR) based on the velocity gradient. OpenFOAM 1712 has been compiled in a Cluster. A MATLAB code was developed to calculate the parameters of the flow over the double wedge airfoil and its results as compared to the simulations with and without AMR. Moreover, experimental results obtained in a wind tunnel of wings with double-wedged sections were used as a reference to the 3D case. The 2D case presented 0.94\% of accuracy without AMR, and 0.10\% with AMR. In both situations, the shock angle was in agreement with the theory. The 3D results followed the expected tendency and presented satisfactory convergence, although the critical performance penalties due to the AMR mechanism. It was noticed that good practice is no to use the AMR unless the convergence criteria are reached in a less dense mesh.
Keywords
OpenFOAM, Validation, Supersonic, Double-Wedge, Adaptive mesh refinement
