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

作者：Pang Andrew Li Jian^*; Skote Martin; Lim Siow Yong

来源：Progress in Computational Fluid Dynamics, 2016, 16(1): 48-57.

DOI：10.1504/pcfd.2016.074225

• turbulence
• Reynolds-averaged Navier-Stokes
• RANS
• two-equation model
• k-omega model
• k-epsilon model
• flow around cylinder
• high Reynolds number flow
• surface roughness
• curvature correction
• FLUENT

In this work, we analyse the ability for the k-omega (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-omega (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-omega (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-omega (SST) model further improves this model.

• 出版日期2016