Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Numerical study of the flow past an inclined flat plate via spectral/hp element methods with novel stabilization
Submission Author:
Yukari Watanabe Guerreiro Martins , SP , Brazil
Co-Authors:
Yukari Watanabe Guerreiro Martins, Vinicius Malatesta, Rodrigo Costa Moura
Presenter: Yukari Watanabe Guerreiro Martins
doi://10.26678/ABCM.COBEM2021.COB2021-0750
Abstract
This study is devoted to the analysis of the flow past an inclined flat plate simulated with the high-order spectral/hp continuous Galerkin (CG) method at a moderate Reynolds number. A novel numerical stabilization strategy is employed, in which the jump (i.e. discontinuous variation) of the solution’s derivative across element interfaces is penalized. Since CG’s solution is by construction only C0 continuous at interfaces, the jump in question indicates the degree of numerical under-resolution, serving as a natural proxy for stabilization. Although the base strategy is not new, it is here applied with novel adaptations that make it suitable for the simulation of transitional and turbulent flows. Still, although Reynolds numbers typical of turbulent wakes are considered, focus is given to two-dimensional simulations due to the pioneering character of the study. These cases are nevertheless already unstable without added stabilization, owing to CG’s high-order character. Relevant flow characteristics are compared with those obtained in previous works for the sake of validation.
Keywords
spectral element method, High order numerical methods, inclinade flat plate, asymmetric vortex shedding
