High fidelity simulation of a high Reynolds flow around a 5:1 rectangular cylinder

Details

Supervisors

Remacle, Jean-François

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil mécanicien, à finalité spécialisée

Abstract

This thesis report is a contribution to the Jules Verne Benchmark launched by CSTB in 2022. The simulations of high Reynolds flow are preformed on three different meshes specifications using the solver developed at Cenaero, ARGO DGFluid. A thorough analysis of the flow results is detailed to help in the investigation of these not-well known high Reynolds flows around rectangular cylinders. The results extracted showed good concordances with previous simulation found in the literature. The main bulk parameters of the flow reached expected values for the lift and drag coefficient, or the Strouhal number. The same observation was made on the mean flow features around the cylinder. Some inconsistencies within the three simulation showed the importance of the detached shear layer refinement and of the period of accumulation of statistics. A crucial point however is the highly correlated pressure component obtained while conducting a spanwise correlation analysis. These results are outperformed by literature results while having a finer grid spacing in the spanwise direction. The correlations of the velocity vector in the x and z dimensions for the wake and the boundary layer showed however reassuring results. Finally, this thesis observes the convergence towards a symmetry of the mean flow features and statistics.