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

Authors: Andrew Li Jian Pang; Martin Skote; Siow Yong Lim

Addresses: ERI@N, Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore ' School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore ' School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

Abstract: 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.

Keywords: turbulence modelling; Reynolds-averaged Navier-Stokes; RANS; two-equation models; k-omega model; k-epsilon model; cylindrical bluff bodies; high Reynolds number flow; surface roughness; curvature correction; FLUENT; eddy viscosity; system rotation; streamline curvature; SST model.

DOI: 10.1504/PCFD.2016.074225

Progress in Computational Fluid Dynamics, An International Journal, 2016 Vol.16 No.1, pp.48 - 57

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 19 Jan 2016 *

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