Performance of an anisotropy-resolving subgrid-scale model for predicting turbulent channel flow with wall roughness

Y. Zhang, H. Kihara, K. Abe

Research output: Contribution to journalConference article

Abstract

Large eddy simulation (LES) of a turbulent channel flow with wall roughness on one side was performed by adopting an anisotropy-resolving subgrid-scale (SGS) model at a shear Reynolds number = 395. To investigate the grid dependency of the LES results caused by the SGS model, three grid resolutions were tested under the same definition of a roughness shape by using the immersed boundary method. The obtained results were compared with the direct numerical simulation data without roughness (flat wall) and discussed using general knowledge in this kind of flow fields as reference. The primary concern was focused on how the present SGS model could reduce the grid dependency as well as the affects of roughness on the mean velocity and turbulent stresses.

Original languageEnglish
Pages (from-to)235-238
Number of pages4
JournalProceedings of the International Symposium on Turbulence, Heat and Mass Transfer
Volume0
Publication statusPublished - Jan 1 2015
Event8th International Symposium on Turbulence, Heat and Mass Transfer, THMT 2015 - Sarajevo, Bosnia and Herzegovina
Duration: Sep 15 2015Sep 18 2015

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Channel flow
Anisotropy
Surface roughness
Large eddy simulation
Direct numerical simulation
Flow fields
Reynolds number

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

Cite this

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AU - Abe, K.

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N2 - Large eddy simulation (LES) of a turbulent channel flow with wall roughness on one side was performed by adopting an anisotropy-resolving subgrid-scale (SGS) model at a shear Reynolds number = 395. To investigate the grid dependency of the LES results caused by the SGS model, three grid resolutions were tested under the same definition of a roughness shape by using the immersed boundary method. The obtained results were compared with the direct numerical simulation data without roughness (flat wall) and discussed using general knowledge in this kind of flow fields as reference. The primary concern was focused on how the present SGS model could reduce the grid dependency as well as the affects of roughness on the mean velocity and turbulent stresses.

AB - Large eddy simulation (LES) of a turbulent channel flow with wall roughness on one side was performed by adopting an anisotropy-resolving subgrid-scale (SGS) model at a shear Reynolds number = 395. To investigate the grid dependency of the LES results caused by the SGS model, three grid resolutions were tested under the same definition of a roughness shape by using the immersed boundary method. The obtained results were compared with the direct numerical simulation data without roughness (flat wall) and discussed using general knowledge in this kind of flow fields as reference. The primary concern was focused on how the present SGS model could reduce the grid dependency as well as the affects of roughness on the mean velocity and turbulent stresses.

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