Article: Effect of the numerical dissipation and resolution on large-eddy simulation of turbulent square duct flow Journal: Progress in Computational Fluid Dynamics, An International Journal (PCFD) 2023 Vol.23 No.4 pp.197 - 212 Abstract: Performance of large-eddy simulation (LES) in the presence of numerical dissipation due to the Rhie-Chow interpolation is assessed for the prediction of turbulent flow in a square duct. A wide range of resolutions and bulk Reynolds numbers Reb = 2,500 and 5,693 are investigated. A second-order colocated finite-volume solver with the dynamic Smagorinsky (DS) subgrid-scale (SGS) model is employed. To distinguish between the role of the numerical and SGS dissipations, LESs without an SGS model are also performed. LESs without the Rhie-Chow interpolation did not experience numerical instabilities. Use of the Rhie-Chow interpolation, however, increased the error in the wall shear stress and enstrophy predictions, which were more pronounced at coarse resolutions. Significant mis-predictions in Reynolds stress and its anisotropy were also observed at coarse resolutions, which were improved, to some extent, by omitting the Rhie-Chow interpolation. Convergence behaviour of important flow statistics, towards the DNS, were also assessed and resolution requirements were explored. Inderscience Publishers - linking academia, business and industry through research

Title: Effect of the numerical dissipation and resolution on large-eddy simulation of turbulent square duct flow

Authors: Amin Rasam; Zeinab Pouransari; Mohammad Reza Zangeneh

Addresses: Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, 16589-53571 Tehran, Iran ' Department of Mechanical Engineering, Iran University of Science and Technology, 16846-13114 Tehran, Iran ' Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, 16589-53571 Tehran, Iran

Abstract: Performance of large-eddy simulation (LES) in the presence of numerical dissipation due to the Rhie-Chow interpolation is assessed for the prediction of turbulent flow in a square duct. A wide range of resolutions and bulk Reynolds numbers Re_b = 2,500 and 5,693 are investigated. A second-order colocated finite-volume solver with the dynamic Smagorinsky (DS) subgrid-scale (SGS) model is employed. To distinguish between the role of the numerical and SGS dissipations, LESs without an SGS model are also performed. LESs without the Rhie-Chow interpolation did not experience numerical instabilities. Use of the Rhie-Chow interpolation, however, increased the error in the wall shear stress and enstrophy predictions, which were more pronounced at coarse resolutions. Significant mis-predictions in Reynolds stress and its anisotropy were also observed at coarse resolutions, which were improved, to some extent, by omitting the Rhie-Chow interpolation. Convergence behaviour of important flow statistics, towards the DNS, were also assessed and resolution requirements were explored.

Keywords: large-eddy simulation; LES; Rhie-Chow interpolation; turbulent duct flow; resolution requirements.

DOI: 10.1504/PCFD.2023.132219

Progress in Computational Fluid Dynamics, An International Journal, 2023 Vol.23 No.4, pp.197 - 212

Received: 08 Oct 2021
Received in revised form: 06 Apr 2022
Accepted: 05 May 2022
Published online: 13 Jul 2023 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article

Title: Effect of the numerical dissipation and resolution on large-eddy simulation of turbulent square duct flow

Keep up-to-date