Modelling high Re flow around a 2D cylindrical bluff body using the k-ω (SST) turbulence model

摘要

In this work, we analyse the ability for the k-ω (SST) model to accurately predict a high Reynolds number, Re, flow around a cylindrical bluff body, relative to other two-equation RANS models. We investigate the sensitivity of incorporating a curvature correction modification in the k-ω (SST) model to improve the limitation of the eddy-viscosity-based models of capturing system rotation and streamline curvature for a flow around a cylinder. Finally, the ability for this turbulence model to capture the surface roughness of the cylinder is evaluated. Based on this work, we conclude that the k-ω (SST) model is superior to other two-equation RANS models and is able to capture the effects of surface roughness. The curvature correction modification to the k-ω (SST) model further improves this model.